Me too! The problem as I see it would lie in making such a starter light and compact enough, yet still able to crank the engine. Brushless would seem to be mandatory in order to have any chance of success. 20cc-size scale cowlings tend to be pretty tight, too. Weight would be the biggest problem, I think, because the starters don't scale down as much as engine power does when going to a smaller engine size. A look at the weights of the 55-60cc starter and the 30-35cc one will confirm this. A self-starting 20cc would be really nice, but hardly worth it if the airplane can't get out of it's own way. Maybe in a Cub, but a warbird is another matter altogether. I think it is possible, but only at a higher level of technology than that exhibited by the EME products.