I have an excellent gunsmith that works on Detonics pistols. His name is Dave Helton and he works out of Wade's Gunshop here in Seattle, WA. Since this is the home of Detonics we see a lot of them. Call him at 425-649-5995 on Monday or Friday 10-5 PST. He works out of the machine shop on tues, wedn and thurs. Syd Woodcock is also a frequent visiter in our shop and as the chief designer of the original Detonics he is a great resource for technical advice. Wade