Ok, here's the deal. (condensed version ) EF designed and commissioned all three planes. Once production started EF decided that the quality was not up to their standards and cancelled the order. The factory then sold these planes to KMP (Kondor Model Products) who sold them for a while as their products (the planes have KMP cut into their wooden parts). Evidently somehow TOC acquired these planes and also ordered new yaks (with a few design changes) from the original factory.

EF announced a few years ago that they would come out with a 50cc Edge, Extra and Yak. Once this deal fell through (above) and they supposedly lost a bit of money they obviously decided to concentrate just on the Yak right now. Does that mean that they won't come out with an Extra or an Edge in the future? Nobody knows but them!

BTW, I bought one of the Edges off of Ebay and love it. I hate that they sold out of the planes because I was really thinking about getting an Extra.