Hope all that tech is still around, WW! Takes BIG motors to push that much envelope, even at 10 MPH. Fortunately they only want two hours of endurance and they let you have a tether for strong winds. Unfortunately, a tether adds weight. It will be very interesting to see if WSGI is in on this and, if not, whether anyone else is far enough along to meet these required specs at this point. As I said we could get a second shot. Your historical memory is much appreciated! Best regards, IndyJones.