The problem with fixing lockup by adjusting stop pin size is that often the closed blade contacts the stop pin too. A bigger stop pin will cause the closed blade to sot slightly differently misaligningnthe detent on the lockbar, and detent hole in the blade.
Good point. I had yet to even arrive at that observation, as I never got past the more obvious and maddening problems in connection therewith.
My experience with hexagonal and octagonal adjustable stop pins has ranged from apprehension, at best, to outrage, at worst.
At its very best, it nonetheless resulted in hesitancy to use, or God forbid continually flick, my 761, which although the pin was effective at offsetting lock rock, the extremely rapid rate of galling due to the interaction between the titanium and the M390, especially when coupled with it being stepped, required me to adjust the octagonal pin to the next higher surface, approximately once every 2 weeks. Though assured it would be covered under warranty when the very last and highest surface eventually failed to eliminate the lock rock, it was on pace to occur an estimated 16 weeks from the date of purchase, if I continued to use it and not tread lightly, which of course would be lame. The worst implementation was the epic saga of my three (3) Vicars, already explained by me, ad nauseum, elsewhere in this thread. I thought it was an April Fool's Day prank, as adjusting the hexagonal pin to anything other than the initial out of box surface (which proved to be the highest surface), turned all three (3) Vicar's into percussion instruments from the sounds of the blades swinging like upside down pendulums. I am still holding on to the hope it was a practical joke and not an intentional design choice, for obvious reasons.
