In an effort to subdue a rather nasty twang, I took my LJ apart and fitted a piston liner. I didn't do anything else, and all the same parts were reinstalled, but now it won't cock safely. Most of the time, as I try to cock it I can feel the sear trying to engage and failing, but occasionally it catches and stays cocked, but is then liable to go off with a slight jar, obviously very unsafe. The trigger blade is not catching on the guard, and the adjustment screw is backed off so far that it doesn't even contact he blade. The trigger is so basic, with no intermediate sears (it has always been heavy), that it is hard to think of anything that could go wrong.
I wonder if anyone else has had, and solved, a similar problem?