David, I looked back at the blue sheet that came with the 555Rx. Your Rx compatibility with Futaba has a negative shift, whereas the Rx compatibility with Airtronics/JR has a positive shift (which is what I use in the Zagi). That may explain why I am running PPM, and you are running PPM-inv on the Stylus. Since your elevons are working on the Stylus, I do not think this is the problem. Have you flown this Zagi on another radio, or is this a new plane that you are trying to program with the Stylus? I am thinking this is either a Stylus setup problem or wire polarity mix-up with the motor, diode, speed control, and battery. If it is the setup problem, I am giving you my setup. I had the left servo going to Ch. 4 on the Rx and the right servo going to Ch. 3, and the throttle going to Ch. 5. On the Stylus menu for REV (reversing servo direction), I had 1, 2, 3, 6 in the up position and 4, 5, 7, 8 in the down position. I do not know if the compatibility may affect this information on REV. If it is a polarity mix-up, please check carefully the wiring diagram on figure 9 and the write-up on page 8 in the assembly manual. Also, remember the startup sequence for the throttle stick that I described in the first E-mail (try stick down and then turn radio and plane on, also try stick up and then turn radio and plane on). I sure would like to know if you have flown this plane before. Victor Yeung RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]