Shortened the OAT wire runs... soldered and heat shrink... Tested Received the PS Engineering wiring harness for the GMA6000B... Hooked it up to my test bench. Tested the intercom with with 2 headsets. all seems well.
The GTR225 COMM is on back order until March 25th...
Note:
I made up my mind... I placed the order for the electric roll trim kit from Van's... $320 later.