ORIGINAL: terminal velocity
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.
Ever notice when you watch the intro to the EF films that the 85" extra goes flying by? -- OK I only now see it at the beginning of my ULTIMATE 3D DVD in an advertisement for E.F.
I was one week late in getting one of these. Perhaps they are somewhere and will pop back up again.
OK back on track...