Turns out there was a mig welder sitting no less than 5m away from my machine in my neighbours shed!
Just waiting on a new mask and gloves before I can start welding.

Whilst I wait, im thinking about my limt/home switch setup. I currently have 3 NPN proximity sensors.
For the X and Y I will use 1 sensor mounted on the moving parts as both the limit and home switch.

For Z do i need both limit and home?

Also thinking about cable chain sizes. Will the 37x18mm stuff be big enough?