Finally hit the order button. I went with the quickest possible turn-arounds at JLCPCB, which means a bland green PCB. Makes a fine first prototype that is bound to get hacked up as I discover mistakes and make tweeks. It's already in production. And my Digi-Key order is in as well for the components I need to manually add to the prototypes (LEDs, Hall Sensors, battery pack). Here's the confirmation render for part placements that I received. 

Looks good!

Next step is a simple 3D-printable battery case holder so it'll snap on to the back of the board.