Getting a little frustrated with tweaking engine stuff, so in preparation for permanently installing the subpanel I started working on fitting the avionics racks.
The GMC-307 autopilot controller was easy.
Wasn’t so easy to get a correctly-aligned hole in the subpanel to accommodate the GTN-650 rack (the comm/WAAS GPS/VOR/localizer/ILS does-everything box).
Also had to make sure the GTN-650 and GMA-245 (that’s the audio panel) racks were correctly spaced from each other.
Took a lot of filing and fitting to get to this point. The rear rack mount “ears” are actually riveted to two 0.063″ angles that will be held in place by nutplates. I would’ve preferred just to attach them to the front side of the subpanel, but the rack attachment fasteners are too close to the subpanel to allow that.
A nice bit of visual progress, don’t you think?