Seems like if you want to make the effort yourself to tune the system you'll want your own tank. Unless its simply a rebuild to same spec all the time. But I'll assume Christo has nitrogen.
Speski OffRoad LTD, Cargo Solutions for Toyota 4x4's http://www.SpeskiOffRoad.com
"80 series, with a fridge"
1976 FJ40, Project with little progress.
2004 Starcraft 10RT