Quick update:

Control box nearly done, MPG installed one of the cheap aliexpress ones, finally got an E-Stop. Its got space for 5 servos and 1 servo for a spindle, 3 installed. The 7i77 and one cheap parallel breakout board to drive 1 stepper (currently the Z axis, will hopefully rotate the tool changer)

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I tried to keep AC separated from low voltage, the 7i77 to servo connections are using twisted pairs, I ended up hand soldering these. I have tried to ground everything in one place. Some thoughts:

Those cheap ebay "crimp tools" are really effective. The "DB25 solderless connectors" on ebay were invaluable for checking the wiring to the AC servos and the MPG. I got a 800x600x210mm box, I wish I had gone for a 250mm depth the door is catching on the AC servo encoder connectors when closed. I will have to swap the cable trunking out for a deeper version I used 40mm, think I will go for 60mm or deeper.

Z-axis counterweight system next