Roll bar is going to stay bolt-in. At least for a little while longer. Stopped by the shop on Wednesday and we worked out a plan.
I decided to go a different direction with the radio delete panel. I just sold my "1FASTT2" (?) gauge panel/pod, but not before I pulled a bunch of dimensions off it. Last night I decided I'd try to replicate it in .025" Al without the holes.
Not bad. Not perfect but okay considering I used only tin snips, a vice, some wood, and sand paper. Not a perfect copy because I couldn't recreate all the bends but it's stiffer than my previous idea and avoid permanently altering the radio surround. The current plan is to mount two USB ports for the display and ECU but I can add any combination of gauges, switches, and whatever in the future.