That is awesome and you should not need a commercial license if you keep the registered gross weight under 26,000 pounds. Even if the trucks gross is higher than 26,000 you can register it lower to avoid the commercial restrictions. I would not increase the weight, its puts you on questionable legal ground if you are higher than the plated gross and you'll end up paying a lot more in weight fees. If I was registering that, I would figure out how heavy the final truck is going to be when all my stuff is in it and register it at something little higher. The weight fees are brutal (for California 26,000 pounds is around $600 a year in addition to normal registration fees, others states use similar fees for commercial/heavy vehicles).
CTIS is more of a problem than a helper, sure you can air down and air up easily and that is really nice, but typically the system is not reliable and I wound not want it on an expedition vehicle. Remember you have to get air through the hub and there are lots of seals, if one of these seals goes your tires go down, on most systems the other tire on the same axle will also go flat because they are linked via the CTIS system. With a truck that heavy on uneven terrain there is a good chance you'll pull the bead off if the tire goes completely flat and ratchet strap is not going to re-seat it. A similar problem occurs when you have a flat, in a linked system the other side also goes flat.
Rob
You don't inherit the world from your parents, you borrow it from your children.
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1979 Unimog 416 Expedition Camper
1974 Unimog 421
2004 Dodge Ram 2500, 4x4, Double Cab, Cummins Turbo Diesel
2006 25' Airstream International CCD
2009 Harley Davidson
Sugarloaf, Boulder, CO