man this thing is really wierd !!! i just dont understand because ive had 2 ucd60s and had no problem at all and all i have is a low grade jr631 w/537 servos w/ reverser and made my own pushrods w/carbon fiber rods and h9 long servo arms and all my throws are exactly the same up and down. im rrrreally looking forward to hear the answer to this one. will come in handy in the future! let us know.