Al, from your brief description it sounds like the gun was fine and then suddenly developed a timing problem. This sounds like it is likely a broken or cracked spring or some other simple thing that can be easily fixed yourself. If you can give a good description of the issue we can probably make recommendations. If you do need to send it off, other good 'smiths besides those mentioned that come to mind are Bob James in Arizona and Lassiter (Tom Wildenaugh) in Ohio. Alan Harton in Texas is very good but pretty backed up right now.