So, maybe not too surprising but I tried these cheap VESC on ebay, which are nearly half price:
And after flashing the firmware successfully the red light is flashing, the terminal fault reports:
My guess it is something that is out of spec on the hardware that maybe old firmwares were ok with? That is why they are on sale?
Anyways, if someone who is experienced with VESC can let me know any more test to run, or some options I might have. I tried this on both VESC I order and they both have the same problem after firmware update.
If there are on-board voltages to test or components I might be able to replace to bring it back into spec, that would be helpful. If anyone can point me in the right direction of the part of the circuit this error would involve.
You get what you pay for!