regulator to allow usb power and rack (simultaneous?)
(just to rp2040 - how to isolate power line so it doesn't try and power the rest of the system? or not a problem? 

reverse power protection seems to not really be working - heat up/burn/etc. 

flying bus board

is it dangerous to have the thing plugged in via usb and in the europower? 
should that be avoided? usb only for updates? 

inline labels for stuff? so that it shows up nicely in pcb but I don't have to teleport it

mask baord copper connected? 

tiny switches for bootsel

knobcon 

pratt:w

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FIX - 2 REGULATORS WON'T WORK (or shouldn't)

switch blue led resistors

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