I worked on mine my self it was quite easy
http://www.predatormastersforums.co...ost1717240 I just cut a few coils off the stock spring a little bit at a time till it was where i wanted it, polished a few surfaces, installed a shim, than made sure it wouldn't slam fire.
It worked great I dont have a trigger scale but its Miles a head of what it was and breaks nice and clean at the same place every time!