I have done a search but cannot find a specific answer, thus my question.

I'm trying to set up a simple flap function for a jet. I have chosen the correct wing type. 2ail+2Flaps. Each servo has its own channel. I would like to assign flaps to SG 3 position switch. All the way up is flaps up for normal flight. Center position for take off flap and down switch position for landing flap. I'm having a difficult time adjusting each individual flap for their end points at each switch position and even if I think I have it set, when I flip the SG switch to different positions each flap moves down or up at different distances. It should be a simple task and yet I'm having a difficult time.

Thanks in advance.