Did the pt92 trigger job. Just polish no d spring.Followed the video and everything is back correctly. Was NOT aggressive on polishing. I have done trigger work before. Very nice in da but can't lock trigger back in sa. Although SOMETIMES if I really yank on the hammer I can get it to stay. Also, when the grips were off I could get it to lock back if I pressed on the sear slightly. My guess is worn sear but I was careful. Anyone second this diagnosis?