Whew! Last round of mods were huge because as you come to find out quickly, anytime you add a level translator to a board - much less two & much less 10 channels each - you end up having to reroute most of the PCB layout. And as though that wasn't enough, I decided to make a bunch of other small updates and signaling fixes / improvements such that board (a) is now meaningfully different from board (b). <Shudders>
Still, today the box of boards came back - first time populated by someone other than me - and they look and (more importantly work) awesome. The board shop this time took their sweet time but the wait was worth the cost (almost 10:1 versus US companies for the same quote).
A few more small tests and it's away they go to the store to be sold! :)