Another update. So it's been decided as to what's going into and onto this machine now and just tonight I've hit the Go button.

So it's a full conversion using Controller and Motors Etc from Shenzhen Guanhong Automation CO.,LTD (SZGH) in China, including swapping out the Spindle motor for a Custom built Servo Spindle and Drive.

I must say the people at SZGH have been amazing with replys and answering all my many questions. They have bent over backwards to help and are custom building the spindle motor to suit this conversion. All the manuals they have provided are very good with minimal Chinglish.
Both the Engineers and the admin girl I've been dealing with have replied with perfect english and answered every question very quickly. The Engineers clearly know what they are doing and have been very helpful answering technical questions and giving good suggestions going above and beyond to help with the conversion. Any fears I had on the technical backup with it being a Chinese controller have been laid to rest these last few days.

So the finalised spec is this.
4 Axis 1000MDc high performance(ATC & PLC support) Absolute Controller with Type C control panel.
https://www.szghauto.com/product/64.html

7.5Kw (48Nm) 12,000rpm Servo Spindle and Drive. Based on this but higher RPM with custom machined shaft to Fit Fadal Pulley.
https://www.szghauto.com/product/114.html
https://www.szghauto.com/product/125.html

1.5Kw 130mm AC servos with Japanese Tamagawa-Seike 23bit Absolute encoders. With Matching AC drives.
https://www.szghauto.com/product/156.html
https://www.szghauto.com/product/141.html

Along with all cables I/O and Relays boards, brake resistor for spindle etc and they even through in a nice MPG pendant FOC.

The price was amazing coming in just over £4k delivered to my door. This is plus VAT but I can claim that back.
That's a lot of serious stuff for that price so lets see what happens when it lands.?