Update: issues resolved.
After watching Nick Shabazz’ video on disassembling and maintaining the Chaparral, and getting advice from Sharp Guy on how to adjust the lock bar tension, I took mine apart, cleaned it up, re-lubricated the moving parts, slid the lock bar spring away from its fully seated position by about 1/8”, put everything carefully together, repositioned the clip to fit exactly into the channels, adjusted the pivot screw for easier blade opening without blade play, and, voila, all is fine.
Sal, I would say that my lock bar stock has unchamfered edges, but with the reduced spring pressure that is a non-issue. I would also suggest the lock bar spring be lengthened enough to reduce the pressure.
I am happy to have this newest version of the Chaparral. I think it is one of the best small EDC designs out there.
Overheard at the end of the ice age, “We’ve been having such unnatural weather.”