I have used several of them over the years, One was perfect the second arrived with the bottom of the bridal extending well below the bottom of the plate. I sent it back and received another that was better but still needed a little filing. The ones I used were good sparkers, and generally needed very little tuning. I have used their Bedford percussion on my cap gun and have shot it extensively. It has a very short throw and is exceedingly fast. I have taken home some $$ with that lock on a Bedford 45 cal. The lock is definitely better than the old Russ Hamm lock, which I have used as well.
Ron