An expended fire extinguisher is a great tank. Many sizes. Free at the fire
extinguisher dealer. Or pick the size you want and buy it new. Most are
aluminum, cheap, and weigh next to nothing.
Lynn E. Hanover
-------------------

===> That's a great idea, and I can already think of a couple candidates.
I'd actually prefer something that's clear enough to see the fluid level
though.  I'll be using an FD AST for the pressure system, so the overflow
just needs to be a plastic jug that's sturdy enough to handle 6 G's at full
capacity.

Thanks,
Rusty