I rearranged some components for the node pcb revision, added some mounting holes just in case, added the voltage regulator, and managed to unintentionally maintain the same footprint as the first iteration of the pcb.

(add pictures here)

I designed for a buck converter for it's efficiency and liked the TSR 1-2450 for it's small size and pin compatibility with TO-220 package LM regulators so I could use the cheaper regulators for testing.  The buck converters are a little pricey at around US$9 from Newark.