Here is a scan of my modified parts next to original M-16A2 FCG parts...
Larger Pic:
http://www.quarterbore.com/images/sf-ll-gp-large.jpg
I looked at my kit and I am using the M16A2 hammer spring and I did leave the burst cam in place to help with the spacing...
I hope this helps! I cut mine down in about 15-minutes but I did mess up the first set because of removing too much material... I think I described that above...
Also, the top left disconect ONLY has a noch that makes this disconnect NOT get tripped by the LL when the selector is set into the Semi position... The scan makes it look like I removed material from the hook of the disconnect that catches the hammer... It is an illusion... That should not be changed!