I agree with the rest, or at least that it may be true. I don't agree with the 15% thing. Now that my 2300 is thoroughly broken in I should try the lower nitro fuels again to see if there is any noticeable change in performance from when I did this early on. My early testing showed that there was no danger in detonation on 15% fuel, and that the idle and acceleration were much improved over 5%. The engine was not flyable on 0%, and 10% was okay, but not great. My engine is coming off the Sukhoi to do a re-evaluation after a season or two of flying. I'd like to also remove the pump for simplicity's sake. We shall see.