Tuning S&W 78g

I see you live in Texas and I know there’s people out that way that will do it if you look them up. Here in Pennsylvania Rick at precision pellet Can do it.If you watched a video on YouTube, you could see how easy they are to work on. If your mechanically inclined you could do it yourself. You can buy seal kits on eBay for it.But if you don’t wanna do it yourself, I know there’s people on here that can recommend somebody closer for you.