I can't imagine doing any mods to it at all right now. After coming from a 6 liter gasser to this it has more power than I could have dreamed of. Especially with 'only' a 9000lb trailer behind it. The truck truly accelerates and drives exactly like it does without the camper.
I think I'm even throwing in the towel of maintaining it myself this time, I've always done all of my own work on all my trucks over the years, but I think I'll let the dealer take over from here.
Plus I get free oil changes as long as they keep up with everything else, per the owners manual.