Advice? PM2 has bad lockstick

Recently installed blue titanium hardware on my PM2, cleaned thoroughly, replaced hardware and adjusted pivot how I like. Knife locks up hard, requires force and makes grinding/scratching sound when lock is finally disengaged. Tried taking apart and cleaning a second time, but it seems to me the new stop bar is out of tolerance or something. Wondering If I did something wrong, or just got a bad part. Knife worked great before and had no lockstick, and I've disassembled, cleaned, and sharpened it multiple times with no issues.