Skull, there is a standard 95" Stage I map installed on the RT that you can use, though from the list of mods you provided at the end of you post, it sounds like you may have already purchased and installed that download separately. If you did, then the one that comes with the RT should be the same map. Anyway, if you simply install that map and do nothing else, judging from my own experience doing the same thing with my SEEG which has slip-ons and the Stage I air cleaner, I would say it is around 90% accurate.
As far as the dyno tuning, that is what will get you the other 10%, or for discussion's sake, probably around 2-3 HP and ft./lbs. Like you, I have no one nearby that I trust to do the dyno tuning, so I have been satisfied to leave mine well enough alone. But when I do find someone, I will have already purchased the RT and be ready to go.
But again, if you already have the Stage I download that you purchased for $150, I would not purchase the $300+ RT only to install the same map from it that you already have.