This .45 rifle I've got with the unidentifiable lock, I just can't get good spark out of it. When I got it the frizzen was beat all to hell. It had been "dry fired" many, many times probably with little success since the vent was just a pinprick in the Douglas barrel. I drilled out the vent to 1/16th, polished up the frizzen and did the "Cherry Red" treatment. That got me about 2 or 3 out of 5 tries would get me enough spark to actually fire the thing. Repeated the "treatment" a number of times with no improvement. I think that frizzen is shot and needs replacement. Also, thing never did like to go into halfcock. If I set or hold the rear trigger back, I can get it into halfcock, but it don't "Click". When I took thing apart to clean it up, I noticed a lot of tool marks on the tumbler and the corner of the breech plug. Someone had taken a file to it and the halfcock notch is nearly nonexistant. I don't have the tooling to make a new tumbler and I certainly don't have any idea what firzzen to buy to replace this one. Any suggestions as to who I might send this thing to to get it "Tuned Up"?