Not a big update but I've made 8 x 20mm thick spacers required to get the correct ballscrew/linear slides spacing for the machine.
One of the first projects for the machine once I get it working and dialed in will be to make new X and Z axis plates from 30mm thick material, rather than the 10mm with 20mm spacers. I'll also be making 6mm thick side plates to reinforce the whole assembly.