I suspect my choice was a function of my ignorance. I scanned the pop rivet section at Ace hardware and didn't noticed anything that resembled an "8-32 threaded pop-rivet." I suppose I could have asked for help, but that would have threatened my masculinity! ;-) <br><br>I stumbled upon the allen screw and liked it's knurled top. I figured that would be easy enough to open with my clumsy fingers. I plan on making a few more with my boys, so perhaps I'll swallow my pride and ask for help in my search for a threaded pop rivet.<br><br>I already have a small twist drill, but I don't recall what size the bit was. But I liked the easy of controlling the drill. You simply hold down on the swivel top with your index finger and spin the drill back-and-forth between your thumb and middle finger.<br><br>I have the small bottle of Stabil. I think I'll go buy a bigger one and transfer the remaining fluid to the new bottle. On the one I have the decanting opening is level with the top. The web site shows a "new" design where the decanting chamber top extends above the bottle to serve as a nozzle. That might make it easier to pour into lawn mower gas tanks, but it's not as nice for backpacking. :-(