Hello, it has been a while since I've posted. I purchased a S12 converted with Tapco parts, including Tapco side folder. The only thing left to do is to install a Bolt Hold Open which I purchased from CSS. It does not fit with the current Tapco hammer, I saw the tutorial from CSS and during the video he stated that I had to grind off (sand off) .050 from the hammer, I am sure that he means from the same side that the BHO goes on, the thickness of the BHO is .088. When I install the hammer (