I will not get into that -except to say the carb has to be drilled in the feed passages and compression needs to be same as th glo engine 26 - It would be easier to use a 26 glow engine and fit the head for the small plug and use a smalltuned can with exhaust pressure - the Pitts type is still a worthless piece of ****. I ran ST2300 with this setup and ground rpm was typically 9000 on 18x8 APC--and it wasn't even a racing setup -it was an aerobatic models. which throttled beautifully and never ran lean.