Originally Posted by meanmrmustard

Good explanation. I did the same for another gentleman on here literally yesterday. It is not as difficult as some would let on, but needs patient attention. I do however want to add to your abridged tutorial that the proper punch size for the gas tube pin is 5/64, gotten at any hardware store, and require no fitting to use. Other than that, same description I gave, and yours took less typing! DIY is the best way to learn about the inner workings.