thanks for the info jimz. i don't know what i was thinking when i wrote 30%... 30cc would be what I meant. i know that aero-works airframes are well built but light and i was hopeful , but that's what i thought also.any recommendations for a good model for this engine? i want to get into aerobatics and have always liked the extra. but i'd like something that I can develope some chops on,know what I mean.thanks for your response