RE: Dynaflite Butterfly tricycle gear conversion???
I'm with the others that say just hand launch and belly land. Or if you're flying from a paved or rough gravel field then maybe one belly wheel and some wire tip skids at the dihedral break.
If you're thinking of this because it's hard to taxi in a cross winds then you're practicing with the wrong model. The high amount of dihedral will make models such as the Butterfly nearly impossible to taxi in any sort of wind regardless of using trike gear or conventional. THis is a "carry it out and set it down facing into the wind" sort of model.