diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index c305f864ea..717cc07d05 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -426,14 +426,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             return key;
         }
 
-        // convert a LSL_Rotation to a Quaternion
-        public static Quaternion Rot2Quaternion(LSL_Rotation r)
-        {
-            Quaternion q = new Quaternion((float)r.x, (float)r.y, (float)r.z, (float)r.s);
-            q.Normalize();
-            return q;
-        }
-
         //These are the implementations of the various ll-functions used by the LSL scripts.
         public LSL_Float llSin(double f)
         {
@@ -2331,7 +2323,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 // using it would cause attachments and HUDs to rotate
                 // to the wrong positions.
                 
-                SetRot(m_host, Rot2Quaternion(rot));
+                SetRot(m_host, rot);
             }
             else
             {
@@ -2341,7 +2333,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 {
                     rootPart = m_host.ParentGroup.RootPart;
                     if (rootPart != null)
-                        SetRot(m_host, rootPart.RotationOffset * Rot2Quaternion(rot));
+                        SetRot(m_host, rootPart.RotationOffset * (Quaternion)rot);
                 }
             }
 
@@ -2351,8 +2343,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         public void llSetLocalRot(LSL_Rotation rot)
         {
             m_host.AddScriptLPS(1);
-
-            SetRot(m_host, Rot2Quaternion(rot));
+            SetRot(m_host, rot);
             ScriptSleep(200);
         }
 
@@ -2498,8 +2489,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         public LSL_Integer llRotTarget(LSL_Rotation rot, double error)
         {
             m_host.AddScriptLPS(1);
-            return m_host.ParentGroup.registerRotTargetWaypoint(
-                new Quaternion((float)rot.x, (float)rot.y, (float)rot.z, (float)rot.s), (float)error);
+            return m_host.ParentGroup.registerRotTargetWaypoint(rot, (float)error);
         }
 
         public void llRotTargetRemove(int number)
@@ -3111,7 +3101,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 // need the magnitude later
                 // float velmag = (float)Util.GetMagnitude(llvel);
 
-                SceneObjectGroup new_group = World.RezObject(m_host, item, pos, Rot2Quaternion(rot), vel, param);
+                SceneObjectGroup new_group = World.RezObject(m_host, item, pos, rot, vel, param);
 
                 // If either of these are null, then there was an unknown error.
                 if (new_group == null)
@@ -3193,7 +3183,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                     return;
                 }
 
-                m_host.StartLookAt(Rot2Quaternion(r3 * r2 * r1), (float)strength, (float)damping);
+                m_host.StartLookAt((Quaternion)(r3 * r2 * r1), (float)strength, (float)damping);
             }
         }
 
@@ -3619,7 +3609,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             }
             else
             {
-                m_host.RotLookAt(Rot2Quaternion(target), (float)strength, (float)damping);
+                m_host.RotLookAt(target, (float)strength, (float)damping);
             }
         }
 
@@ -6970,7 +6960,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
             if (!m_host.ParentGroup.IsDeleted)
             {
-                m_host.ParentGroup.RootPart.SetVehicleRotationParam(param, Rot2Quaternion(rot));
+                m_host.ParentGroup.RootPart.SetVehicleRotationParam(param, rot);
             }
         }
 
@@ -7001,7 +6991,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 rot.s = 1; // ZERO_ROTATION = 0,0,0,1
 
             part.SitTargetPosition = offset;
-            part.SitTargetOrientation = Rot2Quaternion(rot);
+            part.SitTargetOrientation = rot;
             part.ParentGroup.HasGroupChanged = true;
         }
 
@@ -8066,13 +8056,13 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                             if (rootPart == part)
                             {
                                 // special case: If we are root, rotate complete SOG to new rotation
-                                SetRot(part, Rot2Quaternion(q));
+                                SetRot(part, q);
                             }
                             else
                             {
                                 // we are a child. The rotation values will be set to the one of root modified by rot, as in SL. Don't ask.
                                 // sounds like sl bug that we need to replicate
-                                SetRot(part, rootPart.RotationOffset * Rot2Quaternion(q));
+                                SetRot(part, rootPart.RotationOffset * (Quaternion)q);
                             }
 
                             break;
@@ -8414,8 +8404,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                         case (int)ScriptBaseClass.PRIM_ROT_LOCAL:
                             if (remain < 1)
                                 return null;
-                            LSL_Rotation lr = rules.GetQuaternionItem(idx++);
-                            SetRot(part, Rot2Quaternion(lr));
+                            SetRot(part, rules.GetQuaternionItem(idx++));
                             break;
                         case (int)ScriptBaseClass.PRIM_OMEGA:
                             if (remain < 3)
@@ -11878,13 +11867,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                                     else
                                         rot = obj.GetWorldRotation();
 
-                                    LSL_Rotation objrot = new LSL_Rotation(rot.X, rot.Y, rot.Z, rot.W);
+                                    LSL_Rotation objrot = new LSL_Rotation(rot);
                                     ret.Add(objrot);
                                 }
                                 break;
                             case ScriptBaseClass.OBJECT_VELOCITY:
-                                Vector3 ovel = obj.Velocity;
-                                ret.Add(new LSL_Vector(ovel.X, ovel.Y, ovel.Z));
+                                ret.Add(new LSL_Vector(obj.Velocity));
                                 break;
                             case ScriptBaseClass.OBJECT_OWNER:
                                 ret.Add(new LSL_String(obj.OwnerID.ToString()));
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/MOD_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/MOD_Api.cs
index 929948b3e1..84cf6cab65 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/MOD_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/MOD_Api.cs
@@ -333,8 +333,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             {
                 if (type == typeof(OpenMetaverse.Quaternion))
                 {
-                    LSL_Rotation rot = (LSL_Rotation)lslparm;
-                    return new OpenMetaverse.Quaternion((float)rot.x,(float)rot.y,(float)rot.z,(float)rot.s);
+                    return (OpenMetaverse.Quaternion)((LSL_Rotation)lslparm);
                 }
             }
 
@@ -366,8 +365,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                             result[i] = new UUID((LSL_Key)plist[i]);
                         else if (plist[i] is LSL_Rotation)
                         {
-                            LSL_Rotation rot = (LSL_Rotation)plist[i];
-                            result[i] = new OpenMetaverse.Quaternion((float)rot.x,(float)rot.y,(float)rot.z,(float)rot.s);
+                            result[i] = (OpenMetaverse.Quaternion)(
+                                (LSL_Rotation)plist[i]);
                         }
                         else if (plist[i] is LSL_Vector)
                         {
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
index 321d1d8659..37766fbbb7 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
@@ -2565,7 +2565,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 ScenePresence sp = World.GetScenePresence(npcId);
 
                 if (sp != null)
-                    sp.Rotation = LSL_Api.Rot2Quaternion(rotation);
+                    sp.Rotation = rotation;
             }
         }
 
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
index 8b3be4a440..4dd795da10 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
@@ -352,7 +352,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
                 q = avatar.Rotation;
             }
 
-            LSL_Types.Quaternion r = new LSL_Types.Quaternion(q.X, q.Y, q.Z, q.W);
+            LSL_Types.Quaternion r = new LSL_Types.Quaternion(q);
             LSL_Types.Vector3 forward_dir = (new LSL_Types.Vector3(1, 0, 0) * r);
             double mag_fwd = LSL_Types.Vector3.Mag(forward_dir);
 
@@ -482,7 +482,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
                 q = avatar.Rotation;
             }
 
-            LSL_Types.Quaternion r = new LSL_Types.Quaternion(q.X, q.Y, q.Z, q.W);
+            LSL_Types.Quaternion r = new LSL_Types.Quaternion(q);
             LSL_Types.Vector3 forward_dir = (new LSL_Types.Vector3(1, 0, 0) * r);
             double mag_fwd = LSL_Types.Vector3.Mag(forward_dir);
             bool attached = (SensePoint.ParentGroup.AttachmentPoint != 0);
diff --git a/OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs b/OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs
index 4ab2f236ca..c9c4753195 100644
--- a/OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs
@@ -361,6 +361,14 @@ namespace OpenSim.Region.ScriptEngine.Shared
                     s = 1;
             }
 
+            public Quaternion(OMV_Quaternion rot)
+            {
+                x = rot.X;
+                y = rot.Y;
+                z = rot.Z;
+                s = rot.W;
+            }
+
             #endregion
 
             #region Overriders
@@ -407,6 +415,21 @@ namespace OpenSim.Region.ScriptEngine.Shared
                 return new list(new object[] { r });
             }
 
+            public static implicit operator OMV_Quaternion(Quaternion rot)
+            {
+                // LSL quaternions can normalize to 0, normal Quaternions can't.
+                if (rot.s == 0 && rot.x == 0 && rot.y == 0 && rot.z == 0)
+                    rot.z = 1; // ZERO_ROTATION = 0,0,0,1
+                OMV_Quaternion omvrot = new OMV_Quaternion((float)rot.x, (float)rot.y, (float)rot.z, (float)rot.s);
+                omvrot.Normalize();
+                return omvrot;
+            }
+
+            public static implicit operator Quaternion(OMV_Quaternion rot)
+            {
+                return new Quaternion(rot);
+            }
+
             public static bool operator ==(Quaternion lhs, Quaternion rhs)
             {
                 // Return true if the fields match:
diff --git a/OpenSim/Region/ScriptEngine/XEngine/EventManager.cs b/OpenSim/Region/ScriptEngine/XEngine/EventManager.cs
index a1ad07d43c..cee10df54a 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/EventManager.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/EventManager.cs
@@ -391,8 +391,8 @@ namespace OpenSim.Region.ScriptEngine.XEngine
             myScriptEngine.PostObjectEvent(localID, new EventParams(
                     "at_rot_target", new object[] {
                     new LSL_Types.LSLInteger(handle),
-                    new LSL_Types.Quaternion(targetrot.X,targetrot.Y,targetrot.Z,targetrot.W),
-                    new LSL_Types.Quaternion(atrot.X,atrot.Y,atrot.Z,atrot.W) },
+                    new LSL_Types.Quaternion(targetrot),
+                    new LSL_Types.Quaternion(atrot) },
                     new DetectParams[0]));
         }
 
diff --git a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
index eee5d7b7b9..f5ad99073d 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
@@ -1558,7 +1558,7 @@ namespace OpenSim.Region.ScriptEngine.XEngine
                 else if (p[i] is Vector3)
                     lsl_p[i] = new LSL_Types.Vector3((Vector3)p[i]);
                 else if (p[i] is Quaternion)
-                    lsl_p[i] = new LSL_Types.Quaternion(((Quaternion)p[i]).X, ((Quaternion)p[i]).Y, ((Quaternion)p[i]).Z, ((Quaternion)p[i]).W);
+                    lsl_p[i] = new LSL_Types.Quaternion((Quaternion)p[i]);
                 else if (p[i] is float)
                     lsl_p[i] = new LSL_Types.LSLFloat((float)p[i]);
                 else
@@ -1584,7 +1584,7 @@ namespace OpenSim.Region.ScriptEngine.XEngine
                 else if (p[i] is Vector3)
                     lsl_p[i] = new LSL_Types.Vector3((Vector3)p[i]);
                 else if (p[i] is Quaternion)
-                    lsl_p[i] = new LSL_Types.Quaternion(((Quaternion)p[i]).X, ((Quaternion)p[i]).Y, ((Quaternion)p[i]).Z, ((Quaternion)p[i]).W);
+                    lsl_p[i] = new LSL_Types.Quaternion((Quaternion)p[i]);
                 else if (p[i] is float)
                     lsl_p[i] = new LSL_Types.LSLFloat((float)p[i]);
                 else