I'm going this afternoon to "rescue" a 120 gallon tank that was used to pressurize a well water system. I was originally going to use punkins' but decided against it - too seasonal, I want "ammo" that's available all year round... I decided on those new 1.5 liter soda bottles because they fit inside a 4 inch sched. 40 PVC pipe, thus reducing costs for materials( you wouldn't believe how much they get for poly pipe in 5 inch sched. 80) I figure it should chuck the bottle(filled with water) at least 2500 feet. Now I just gotta get some money to build the freakin' thing!

Toolmaker