Hi Mike,
dont know the CH controller, but EAW1.28e Fix12 can handle up to three different controllers.
So also that controller should work somehow.
That guy should contact LLv34_Doc or Dumo, at least the communication should work then.

Greetings,
Knegel
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1st engined flight by Richard Pearse, Waitohi, New Zealand, March 31, 1902. Karl Jatho, 1st flight, 18.August 1903, Hannover-Vahrenheide, real controlled flights.
The Wrights, 1st flight, 17. December 1903. They wasnt the 1st, but still claim this!