Bryan, The sum total of all of my testing proved conclusively that the radio setup is not the problem. Like I said, we never identified the exact problem but through extensive testing we removed the radio and servos and wires as having any part in it. It seems likely that you have already reached that point in the testing you have already done. Like I said before, nothing helped the range problem until I installed the whip antenna. Do the same test I did with the plastic tube and run you antenna vertical and see what happens to your next range test.