Oh yeah great idea with the copper line. Or even just black pipe? Hard pipe either way is Def the way to go. As far as the propane tanks go... I've used quite a few rigged up to supplement my smaller air compressors while on the job site, say like doing a large roof. I'll get a new one, once it's done, make sure it's clear, drip and weld a petcock in for moisture. And it would be a great idea to put a 1/4 steel plate on the back of my back seat... Just for piece of mind.
The air suspension would be nice! I'd love to have that smooth ride! But that's not in the funds right now... But that's something I can add later on with this setup! I appreciate the input guys! And thanks for that vid... Eye opening.