Glad it's a happy ending finally! Mine .22 prefers super field 5.51 to jsb, 10shot group at 25yard covered by a 5pence is the norm. Don't try turning the back screw there's a helicoil anti tamper stopping it from turning. I've had mine removed on both breakers with top hats fitted to the hammer Spring. I'm now torn with having to sell one to fund a new purchase.