Yes, the mod is reversible. They store your stock settings in the dealer's laptop and can re-load at any time. They offer a money-back guarantee, and reloading your stock setup is how they get you back to square one.
As far as the TPS and 'needling' to enrich the trim adjustment, does this apply to a FI bike too? I'll read the 5 step thing when I have some time away from work. Thanks for the link.
Michael