No, I don't have a tool box... I actually thought about one just for this purpose, but didn't want to limit my cargo space (carry an ATV quite regularly which barely fits with the tailgate down as it is).
I also thought about under the truck, but decided it would be a pain to get to the bottle for refills and I didn't want to have to fabricate a box to protect the bottle and fittings from any road debris...
I had myself talked into behind the seat as it just looked like the best option all the way around so a plasma cutter, a jig saw, a couple wrenches, and a couple hours later and the 15lb bottle fits very well behind the passenger seat... And, the seat will go all the way back. If it weren't for the shiney purple bottle opener, you wouldn't even know it was there climbing in the passenger door.
Thanks for the suggestions! If I had a digital camera, I would have taken pictures of the mods.
Now, I've just got to get the bottle filled
Edited by: sp33d