got the ST .45 on mine. the plane and engine were given to me free. the guy was sick of fixing where the landing gear mounts to the fuse (and had ripped itself clean a couple times) i think i got that prob whooped. the engine ran horribly when i got it. i tore it down (thinking it was junk) and found no damage really. just a ton of varnish. cleaned it, lubed it re-assembled and it runs much better. not what i would call perfect but at least acceptable. runs great in the mid to high rpm. and the plane flies awesome. almost unlimited vertical. it stops going up eventually, but i get bored going straight up and have to do something before it tops out anyway.

check out the crazy repairs i did to reinforce that weak point where the landing gear attaches. I think it will take on anything now. check out the re-construction thread [link=http://www.rcuniverse.com/forum/m_6091745/tm.htm]here[/link]