Have a question. I have a Trapper pistol. It holds at half cock but if the trigger is pulled the hammer falls. Works fine from full cock, whether I use just one trigger or the set. I took the lock apart to see if there might be a burr or something keeping the hall cock sear from holding. Didn't find anything. But I did notice the fly is missing. It has a place for one. Could this cause the sear from not engaging correctly?