Yeah the problem is when setting center and endpoints it thinks youre *****g out your endpoints on your trasmitter. So i set my trasmitter to 150% up and down, then set endpoint travel on the hitec programmer HFP-25. After thats done i can set each flap setting in the flap menu on the DX18. If you dont set 150% on your trasmitter it wont work properly. Cause the programmer is looking for MAX endpoint travel. If you have your trasmitter set to 100% thats not the max travel since you can go past that to 150%. Hope you understand my explenation lol