Look at the wing. Does the wing of the Spark seem a little different to you? I seen lotsof foamies with stepped leading edges before the Spark. See anyboby complaining about that?
All pattern planes are so similar that to say there copies is telling the truth. The Spark is a copy of previous designs. It's part of the evoulution. Most new designs are tweaks.Either way who really cares?
Sue???? Say what??? I'd love to see the settlement.Let's see it couldbe 2 glow plugs and a prop wrench. This hobby is not that big a deal. Come on Bla Bla confess.