I started this evening working on a support brace between the forward panel and the sub panel. This will hold the avionics stack in place and help support the sub panel.
I used an old piece from the sub panel. (I had goofed it up earlier and ordered a new one.) I cut it to size and bent the edges up to give more support.
I then drilled through the panel using a avionic tray to get the correct distance. The panel holes line up with the other mounting holes. I drilled and clecoed the back of the brace to the sub panel.