So, the TKS MX-300 saga continues, but ends on a HIGH note.
Ellison Avionics Services out of Waco provided outstanding service and pricing.
This is my new "go to" place to keep my three MX-300s working in my plane (2 in and one working spare).
The turn-time was fast - maybe 6 weeks, and the price of $642 for a full overhaul was very reasonable.
These are still very reliable VRF/IFR comm-nav radios.
I'm stickin'!
HERE is the address:
ELLISON AVIONICS SERVICES LLC
4201 LAKE SHORE DR SUITE C , WACO, TX 76710