I was a member on Spudtech, never posted much but my name was Spud Warrior. Something makes me think I joined around 2002-3, I'm not sure if the forum was even there then but it was a LONG time ago.

The stuff I'm using must be different because it doesn't really start to stink, but it seems to "disappear" after a while.

I saw someone say Vaseline, that's petroleum based, but is it safe for this application?

I'm using a 3" ABS endcap inside a 4" PVC chamber for my coaxial cannon. Very reliable and the piston is pretty much a chode lol, maybe 2.5" long and 3.5" diameter. I used a few coats of black rubberized spray paint to get it to seal better. It's still wasn't a perfect fit but the thing shoots so ha...

Right now I'm just shooting potatoes, I'm too scared to shoot anything solid because the area behind my house is only about 2-300 yards of sparsely wooded desert. The taters are good because they turn into mist once they hit anything. I'm having a hell of a time getting this thing sealed. So far I h...

Thanks guys, I'll try and get damage pics soon.

The barrel supports are glued in there, how well I'm not sure but they havent come loose yet.

The bike is a 07 RM250, I love it!

I've been out of the tater launching world for a few years. Started with some tiny combustion cannons and then to a 1.5" ball valve pneumatic and then to a 1.5" sprinkler valve cannon. This summer I just got the itch to build something better than all those other ones so I decided to make a coaxial ...

I've been using vegetable oil and it seems to work fine.