Thanks for the reply Eddy.

The spindle was the easiest place to mount as I am limited for space. It works fine for milling PCBs as I only really need it on for the actual milling run, and maybe the drilling if its a busy board. I am sure this design will get tweaked with use and I am thinking I could make some brackets that fit to the plate behind the spindle. Food for thought anyway.

Being a glutton for punishment I remade the IO board again from the latest PCB design (1.3). This was mainly because I have someone else who wants to make one, so I wanted to prove the latest design before releasing it. (I was still using v1.2 with a couple of bodged resistors) Well I am pleased to say that it all worked first time without issue, and hopefully that's the last time I mess with it.

I also managed to fix a couple of minor bugs in the USB controller firmware and just have to decide what to use the last button on the front panel for. Auto tool zero is something I use quite a bit so that might be an option. Again over time, I am so these will get tweaked.

Lastly, I have ordered a couple of bits of 4mm aluminium to replace the acrylic plate behind the spindle, and then I can try and get the camera mounted properly.