So the TCA Sidestick yaw/rudder twitch finally got bad enough that I went ahead and followed your process. After disassembly, I found the wires separated well enough but found one of the wires pretty badly pinched. See photo below. I simply routed them away from the plastic post behind them which I think was binding them up. They really could have done a better job.
I guess those with this problem had our units built by someone late in the day on a Friday! 
