P1 mechanical: USB-A fouling with backpanel
The USB-A connector fouls with the backpanel cutout. The connector has 1mm flanged ends and the cutout doesn't account for this. On the mock-up prototype it looks like these were straightened out with pliers.
https://www.mouser.fr/datasheet/2/18/1/FRCI_S_A0001365454_1-2537941.pdf