Hey, so that you know whats going on here's a picture: http://i942.photobucket.com/albums/ad268/mikekx/strippedbolt.jpg Using penetrene helped get the other bolts out (on other side), but didnt work on this one. They were all locktighted and really hard to unscrew - they must have welded themselves to the surrounding metal from getting hot and cold I snapped a hardened torx bit, then almost snapped another one. We tried an impact driver and it didnt work so we tried a 3/8 inch ratchet and the bolt head stripped. fair enough we did that after heating up the cylinder with a soft flame and gas bottle, but chickened out at like 80 degrees because we thought it'd warp the cylinder. but how can i get the bolt out now? 1) Weld an allen key or something similar in there and then try to remove it that way? bad idea? probably too small and the spatter would suck get everywhere. 2. drill out the screw without hurting the cylinder? what do you think? Mike.