Great, now things are starting to come together so I intend using:

AXBB-E Motion controller powered with Existing 24V power supply and new 5V PSU (see bellow)

500VA 230v to 2x35v Toroidal transformer (wired in parallel) https://airlinktransformers.com/prod...rmer-cm0500235
Bridge Rectifier Diode, Single Phase, 400 V, 35 A
4 OFF Electrolytic Capacitor, 4700 µF, 100 VDC
3 OFF Stepper Motor Driver 6.0A, 80V CNC https://www.cnc4you.co.uk/Microstepp...tepping-CW8060

Regarding the 5V supply the blurb from CNCDrive say We recommend to use a power supply with at least 500mAmps of current capability of thepower supply. More current may be required if more I/Os are used.so this should be well suitable?
50W 5V DC 10A Enclosed Switchmode Power Supply https://cpc.farnell.com/tt-electroni...90?st=5v%20psu
This was selected as it is cheap enough and as I will be ordering toher stuff from CPC I will get free delivery