I have the solution for M. Saybolt because I encountered the exact same problem. The problem is the adaptor WILL not screw on all the way with other propane canisers besides Coleman. I tried other propane cans and Coleman is the only one it will screw on all the way for. There is nothing wrong with the adaptor itself or your gun. This is useless unless you use Coleman or if your lucky with some other propane canistor I havn't tried. So heed my warning.
-Nice little lube insert on the side
-Comes with a quick and easy to understand manual on safety and proper usage
-Top part of valve (silver side) turns and spins around alot, kind of like a wheel
-There is a tiny O-ring that can easily be lost inside lube valve if not careful
-Designed only for certain propane heads
Rating: [4 of 5 Stars!]