The parts of the throttle quadrant came back painted black. I couldn't resist test fitting it before starting with the actual work of the day.

 I have choosen the second bay behind the F704 bulkhead pilot side to be the location for the com-antenna.

Made centerline and after checking location again, drilled the hole for the coax connector of the com-antenna.

 Just as with the transponder antenna, I'm making a doubler plate to support the antenna due to the external forces of airflow working on it.

 Drilled in place and temporarily mounted.

Bottom side

 Scuffed the primer away and after dimpling, it's now ready for dimpling the skin and then rivetting the doubler plate on.