Good info. Thanks for the reply!

Yea, it looks like that is what is going in it then. A SuperTigre G-91.I knew I should have bought one when Tiger had them for $99 last week!

Are there any weak points in this plane or will the 91 make all kinds of new weak points that I need to reenforce? The firewall area is a given but anything else?

My little stick will take off in 10 feet or so at half throttle, climb straight up and do an aileron roll just about as fast as if it were flying straight. Plus the sound of a screaming engine coming on a pipe (its a muffled tuned pipe) is just pure music.