im looking for a 25 size engine. ive looked at the thunder tiger gp. and the os la. ive heard bad things about la engines but is it only lack of power? i own tt pros in the 40 and 46 size and like them alot. but do not know about the gp's. ive also seen on ebay a tt 25 pro. but i cannot see where that was available. is that an older engine they no longer make? the engine is for a warbird so i am not overly concearned about speed. but i do want a reliable engine that i wont have to fuss with like my other tt pro's.