I registered just to add a "me too" to this thread. I have a 3DConexion SpaceMouse Pro and it works in so many apps, even firefox, but it is useless in Simplify3D. This might not be much of a problem if I could set the mouse controls in S3D to match Solidworks, but they are completely different.
Okay, I cannot understand why you would not put this feature in, it is a longtime request by some of your hardcore users. especially for a 3D program it is hard to imagine how difficult it is to navigate.