Mine is done. Did six flights last week. On the maiden flight, put in two clicks of Aile, and then it was flying fine. Took a couple landing passes to get used to the K-140's residual thrust. But, made 6 good landings, greasing the last 4. When the crosswind whipped up, turned on the Mercury's gyro (20% on all surfaces) and the Rebel was locked right in. During setup, I used the Xicoy scale to balance the plane, and the Rebel was right on the money with the OEM's recommended CG setting. Probably time to peddle the E-Z Balancer? Got to do something with the fin though. It needs some sort of graphic.
I agree with Dave. Throttle management is a great idea, and some folks never get that. I flew at 1/4 to 1/2 throttle almost all the time on these 6 flights. During the last flight, I did hammer it a couple times to see what it does on verticals. I could get a lot more time than the 8 minutes I had on the timer. It was consistently landing with 1/2 to 1/3 of the fuel remaining. Looks like the K-140 is a fuel sipper, the way I fly it. But we all do have to remember the last couple inches of fuel in the bottom goes a lot faster.
The Rebel is about 10 pounds lighter than my T-One. Given that I fly alone a lot, I like that! May have just found a new "go to jet."