Totally agree with John. I'm flabbergasted how that servo is mounted. Pull that servo and remount it, make it right in the center. You might need to get into that opening with a Dremel to open it up a bit, but join the club, we all have had to do it. Just a standard servo arm is necessary. Also, for a trainer with strip ailerons, you only need 1/2" to 5/8" of travel either way. The more important thing is getting that servo centered, standard arm and making sure you don't have more than 5/8" travel up and down. I'm going to include the Tower 40 Trainer manual so that you see how a typical trainer is set up. http://www.towerhobbies.com/products...1110manual.pdf Take a look at it, it's pretty clear how a typical trainer is set up. It's just whacky what somebody before you did. You've got a fine plane there, be persistent to make it right and you will have a good plane that's plenty fun.