While many, myself included , have simply flopped the left and right gimbals in our radios to get the throttle to self center, there is another way. There is a kit with the pieces to add this function to the existing gimbal in Mode 2 radios. I found them on EBay. search youtube for the video. watch twice then do the mod. It took me 5 minutes to complete. Search for this part: Flysky i6S FS-i6S Self Centering Throttle Mode Change to Mode 1 spare part Good luck.