Jim,
The Tigermoth has a 30cc Homelite in it, cuz that's what the weedwhacker box said. It didn't have much power until I plugged the hole above the exhaust port. It flies the plane OK, but I would like to get a little more power out of it so I can do better aerobatics and swing an 18" prop. I think I'll get the bigger carb from Carr like you suggested. I don't want to get into anything like the CH ignition. The extra cost kind of defeats the purpose of converting your own. I'm planning on being at Shelby this year, so I'll probably see you then.

Jim