RE: Cermark Javelin II
I fly mine with YS 63, flies well enough for Sportsman/Intermediate. CG recommendation flies very noseheavy. I put 5 oz lead behind the firewall to make the recommended CG, and needed a lot of up-elevator just to fly straight & level. Took the lead out, it flies a lot better. I'm using 12x7 prop, no problems with clearance.