Hi 
I've installed a 3d mouse (3d connexion spacemouse) that I use with other 3d applications. When I use draftsight WHITOUT connecting 3dmouse, the (normal) mouse cursor has a lag in the response, jumping from one point to another. The problem disappear if I connect the spacemouse. I also point out that it is impossible to invert the SPACEMOUSE zoom mode (joypad forward or back to zoom in or out) without also inverting the right-left movement.

Thanks