Just picked up a used BDX. Updated it, cleaned the map sensors and tightened up the plugs to .028. Loaded what I think is the 91 octane tune. There really wasn't a choice, I just changed the octane to 91 in the parameter that you could change. Went for a drive and noticed the shift to 1st was more firm. And that's the only difference I noticed. Power didn't change. Throttle response didn't change. Anyone else have this happen? It came from 5star by the logo on the back and it appears to have a compatible custom tune available for my truck from a previous owner. Says 87 perf/tow. Would a tuner take the canned tunes off and only load their custom? Thanks guys.