This is just so cool, and kinda obvious in retrospect.
home build smd VESC time.
check his other videos and you will find the heater PCB. alot more cost efficient imo.
Sadly never a good idea to sacrifice a groundlayer either.
But I agree, its very kewl
he said he converts it to ground layer after.
I know, but cutting it up like that wont do you any favours specially not in high frequency or power applications
I would never trust it to do ESCs but definitely neat for smaller data only parts