1.5 hr moving the grounding block and sanding some rivet heads.

I decided to move the grounding block from the firewall to the sub-panel rib.  It'll just be way easier to plug the grounds into it in this location.  I also like that it's right next to the VPX box.
From here I'll run a thick wire (gauge is TBD) to a grounding bolt on the firewall.  Here I've drilled out the main bolt hole and added the rivnut for the center hole in the block.

Done.