RE: Cermark Javilin II
Flight characteristics are first class. I flew mine with a YS63 to practice Sportsman & Intermediate, which it does beautifully. Covering is OK as far as fuel-proofing goes, but visibility was not to my liking, so I strippped it right out of the box, recovered wing & tail with monokote, glassed & painted the fuselage.
Construction is reasonable for an ARF, no joint failures.