I've seen some people using an oxygen tank carrier, but I can't find one that has the properly sized ring in order to hold the tank.It should be collapsible/portable, fairly sturdy, and fit at least my smaller (30 minute) and would hopefully fit the bigger 60 minute tank. Ideally, I want to double it as a mini gun rack (maybe make something out of plastic/wood that I can attach to the handle) so I can rest my guns against it (no more than 2 or 3 rifles).Any other ideas would be welcomed.Thanks!