Hi sjarr. I realize this is on old thread, but I'd also like to purchase a unit for a self install. Of course my local dealer won't sell me one unless they do the install (as required by Truma). I'd rather do it myself (not so much to save money, but because I basically don't trust anyone else to work on my rig). Would you mind sending me a PM, letting me know how you obtained a unit? I want the comfort plus, but doubt anyone, even a dealer will sell me one of those. I'll settle for a comfort model, though. Thanks in advance!