Zinoah also has had a 20cc for a long time with an electronic ignition. It's a toss up what brand is better? The DLE is just the Fair haired new kid on the block so everyones sweet hart. There is also a really great looking new 22cc gas engine from Italy, look it up in the gas engine forum. I know Karol has one but hasn't ran it in a plane yet. I still have one of the original RCS 1.40s or 22cc but it is very high performance and a bit much for a Cub, I pulled the wing off of an 80 inch Kaos with it!! My bad! The point is there are a number of small gas engines on the market for the Cub. I would be looking at the DLE and Zinoah. Also keep in mind the Cub will probably be tail heavy so a bit of nose weight is a good thing. Go look them up in the gas engine forum.