Sig's LT-40 trainer is nearly a 60 size but flies on a more economical 40-46 engine. I really enjoyed our—both the build of the kit and flying (for which we did for 4 seasons). It lives on today as one of our club's trainers.

[link=http://www.rcuniverse.com/forum/m_3477988/tm.htm]Another LT-40 Success Story[/link]