If you mean choosing the correct size motor, ESC and battery for the plane to fly the same as with the intended glow engine then I will agree with you 100%. I still can't do it. The conversion, just installing the components I find easier then installing a glow engine.
I don't think I will ever get the idea of choosing the correct size motor into my head. So far I have just gotten lucky. I gave up on converting the Swoose but the fellow I built the other one for bought his motor, ESC and battery for his. I'm still not sure if it is correct or not. I just tossed in an over size engine I had on hand and know it will work in mine.
When is the big float fly at the Bridge John??