A very good tool to use when working with 3D is a 3D mouse. I got me a SpaceNavigator from 3dconnexion. This is really good 3D mouse, the only drawback is that it is a bit to light so it keeps moving around(it’s meant to be still and work like a joystick). To solve this i made a hand rest that could fit over the body of the mouse. In this way I got some comfort for my hand and it held the mouse in place.