here's a simple mod i found to convert most 1911s to full auto (note this is full auto only, no semi anymore)
Step1: remove slide
Step2: locate silver nub on right side of the gun (the side w/o the mag release or slide release)
Step3: cock the hammer so the nub sticks up more
Step4: file down the nub until it's flush with the rest of the internals
the only real flaw is that sometimes the slide gets stuck halfway back and you have to reach in and lock the hammer down
i'll try to post some photos, but i'm not the most camera savvy person