I installed one of these in a cub I was building. Personally, I think it's a waste of time, space and money. Especially for a small plane. The battery required to start the thing is a very limiting factor, not to mention the extra servo required, and the on board glow igniter. And how do yuou prime the engine?!

And the biggest question I had to ask why? He wanted to be able to start and 'wam up' his cub while finishing his coffee!!

That's just my two cents...