Rebinding middle mouse button?
So I just got the yellow gun, and find it very frustrating it uses the middle mouse button. Is there some way to rebind this command to another button? Such as shift, tab, q, e, or whatever. My mousing grip is such that it is awkward to press the middle mouse button frequently. I imagine there are similar problems for people running two button mice (middle mouse emulation in OS by pressing both button). Or 2 button touchpads.