The mainboard is all setup and ready to go. 6 TMC2209 drivers all configured for UART. There are 2 stepper cable plugs on the mainboard for the dual Z motors and there is a splitter hiding at the rear of the frame for the dual Y motors. So despite 5 stepper motors controlling movement on this machine only 3 stepper drivers are working the motion. The other 3 are for E0, E1, and E2. That's 8 stepper motors and 8 stepper motor cables all under a moving bed and here is how all that came out..