Thanks. I agree that a toolboard is easier.

I had a clone of 1LC board causing heater fault when printing in a enclosure (MCU T >= 81C). I'm waiting for new boards from Filafarm. If the problem persists, I may have to consider a version w/o a toolboard.

I'm thinking to combine wires by voltage, like one wire from the main board to the print head for each GND, +3.3V, +5V, +12V and +24V. And we can provide an additional +12V DC (but one common connected GND).

For the 6HC board, the PWM pins are usually on the lower voltage side. So for the heater and fan, we can still share one +24V, but use separate PWM wires.

Has anybody tried this, any suggestions?