Start taxiing and taking off like it was a taildragger...with full up elevator until the plane is close to lift off speeds, then neutralize it. I do that with a Xtra Easy 2 and 11" prop. I taxi with full up elevator all the time and still cut a little grass. It doesn't hurt anything if I'm careful.

Also, maybe you should think of a new main gear asemblly. They are under $10 at the LHS. Glue pine blocks inside the fuselage and tap 1/4 x 20 nylon bolts. The gear won't bend easily and will shear the bolts if you hit hard, saving the plane. Someone at your club should be able to talk you thru it.