How come you used a APC prop on this one and MA props on the other engines.

Also why not just one thread istead of 15 (pun) lol

On the old FP carb screw the needle asembly out till its just poking inside the carb hole. this should yield another 300-500 more rpm.

On the new LA 15 if you would like a quick easy 1,500 rpm let me know also. shoot an email.