I think the poster of the video was putting the o ring from the lighter on top of the metal TP to seal the top and breech. Not on the bottom where there already a square o ring from the factory. I've seen this done on poly TP's for PCP's where they o ring the top and bottom. On a 22440 I see no real need for it, as the pressures would be no where near that high. Good job on the bolt David, ingenuity made it work!!!