I flew some of the earliest large EDF 4 years ago. Constant issues with batteries not holding up, short flight times "if you flew it like a jet". My turbines are way better...you burn off weight during the flight, so they are lighter to,land. In regards to conversions of your Byron to turbine. I converted one of their F-15's last year, and it's flying just fine on a King Tech K-140. Beefed up the entire airframe, but jet flies great. (Guy from Chicago bought it and did a beautiful paint scheme on it!). I would definately go turbine!