Ogre newt and ogre, threading issues

Hi, in my game engine i have a server thread and a client thread. I want to move the physics from the client thread to the server thread. Ogre is in my client thread. Does Ogre newt constantly need access to ogre? or does it only need to see a mesh once ? Is there any connection between ogre and ogrenewt at runtime after loading, other than the fact that is uses the same classes like vector 3d etc?

I think the rule is to leave anything dealing with Ogre directly (OgreNewt) in Ogre's thread. Sync issues and all that.