Yes, on the Tianchen he used the V 1.02 and for the Teensy he has make a new one with 2x INA226 but you can also used booth with the normal Battery.Ah it seems we're talking about different PCBs? Power PCB for Teensy is different than the one in first picture (labeled as V1.02)? The picture of Bernhard showing Tianchen chassis seems also to be equipped with INA169 from Marotronics and doesn't use INA226.
I think with your 42V you must use the PowerPCB V 1.02 and check the Mosfets and Resistors. The irf9540 mosfet can handle 100V. But for Battery Voltage you will need other Resistors.