So here's "good enough for now" - eventually I'll drill the holes to zig zag some shock cord across the small storage area. The plate above my Yaesu still needs to be drilled for the lightbar switches, and you can see the power outlets that I might use for goose-neck map lights on either side. The whole mess is far enough away that I'm not worried about inadvertently hitting my head on it.
I also have this in mind to keep the mic cord from swinging around. I already tested it out just haven't mounted it, when I pull on the mic the cord falls right out of the holder. If you need to know where I got this little plastic gem . . . it's a piece that has to be removed from an ES300 window regulator before install (holds a wire spool in place).