Just yank the .46 out of your first plane and mount it in the Ultra Stick. It only takes about ten minutes to swap out the engine.

Save your money for a later purchase when you find something other than a 40 sized plane, or decide to go scale and want the 4 stroke sound.

If you buy an engine for every airplane you can afford to buy only half of the airplanes you want. If you buy a radio for every airplane, even less.