Have you thought of running the mic output of the TPS-6L into a RDL box for level control and then pass out to Crestron IADS?
GMAN, I would really be curious to see your layout and design for the APAD in simple as well as the pages for this setup. The APAD is thorn in my side when dealing with SIMPL.
I may be schizophrenic, but at least I have each other.