rtn9105. On your radio question...Do you use two elvator extensions or are you using a Y harness to the elevators? I suspecy you don't have your aux channel turned on. On my 9C in advanced programing mode I'm using Prog 7: in pos 1 I use -20% pos2 -10% pos 3 0% pos 4 -10% and pos 5 -20%. On page 2 of Mix 7 you will need to make sure "Link" is on. I tied mine to switch H but of course you can use any switch you want. If you don't have the Link on this may be your problem.
Be careful with this program and usage. It hurts the knife edge coupling.
Thanks,
Barry
PS: gjeffers. When you put the 100 in did you raise/lower the motor centerline or was it about right?