Hi Rob,

> Can I bolt on another request for a camera that rotates around the camera axis
> like standing still and looking round. It makes it easier to view internal spaces,
> which im finding a bit of a nightmare just now!

A Spaceball/SpaceNavigator helps in achieving what you want, you can lock rotations so it only rotates in one plane.
Once you've used one there's no turning back :)
http://www.3dconnexion.com/

Cheers