Hemi,

If you want to build one the Twin Air is a good 1st twin.

http://www.ne-aero.com/tw45.html

There were some lengthly threads on this one.

http://www.rcuniverse.com/forum/m_2593012/tm.htm

http://www.rcuniverse.com/forum/m_13...tm.htm#1355375

I see he is out of stock on the Twin Air now, but it may be worth checking out.

Greg