Since I had it done, a problem has occurred, I am fairly certain since the Revo update, when we did it the first time he set the boost one up from recommended, said should be no problem etc. and since it was done, every now again when just cruising along at around 3 k revs in 6th, between 70/80 MPH, i.e. just holding that speed the engine just misses a beat, I am sure it is not a misfire, hard to explain, you can just feel it when just sitting on the throttle, like the boost drops off and straight back on, it is very very quick just once every now again, again like in the old days the A/C kicks in and sucks a little engine power all of a sudden, I have tried it with out the AC on, (well as best as not really knowing if it is never off all the time).
I spoke to the Revo Dealer, and since been back to drop the boost to the recommended setting, (6, was 7), no fault codes either, and although it seems to do it even less now, it is still doing it every now again.