http://www.rimfirecentral.com/forums...t=17vs+trigger

or if you have the new t900 or whatever trigger it looks like this


remove the bottome cclip and the trigger comes out. with the lighter spring there will be slop in the trigger so make shims. i made mine out of pop cans at first and had one on each side i then got some brass shim stock and shimed it with that to tigten it up even more.