I have a old S&W Model 19 that needs a tune-up. The cylinder pin is not functioning properly, causing difficulty in opening and closing the cylinder. Is there a real benefit in sending it in to Smith & Wesson for the repairs, or should I look for a good 'smith locally to do the work? I'm thinking I'll go ahead and get the internals stoned/polished while I am at it. Any advice will be greatly appreciated.