I have the 9CAPS that is great. I have been trying to program using channel 2 as master (elevator) and channel 8 (slave to elevator) using PMIX1. I also set the aux channel to Null, set the link on and then off, trim on and off. Problem I am having is if I program in the CROW when I activate it only the master (ch 2) elevator half works. Am I doing something wrong which is a very real probability.

Disable the crow mixer and see if you can set up the elevator-slave mix on its own. Make sure it's working fine, then try the crow mix.

Likely, because the crow mix provides for an elevator trim function, it doesn't pass on the elevator commands to another mixer. Its in the processor.