I've been thinking about installing an OBA (on board air) system under my bed. I took a look down there and I think I can cram a tank right next to the cross member just in front of the spare tire. I want this for airing up my tires, my air bags, and just to have OBA for camping and off-roading. I've never absolutely needed it before but there have been times when it would have been really nice to have. I was wondering what yall's opinions were on mounting and OBA in general. I'm looking to spend up to $350.