I managed to make the little spacers yesterday, and made a start on turning down the ballscrews. Wow, they were hard! Had to grind off all the hard surface before turning in the lathe. I did attempt to take a deep cut to get under the surface first though, but this was impossible with my setup. I suffered worn tips, shuddering and even a couple of sparks! Nevermind, got the x and y screws turned down now.
I made the y-axis bearing block today, using the existing block, I have just bolted a piece onto it, bored for the new bearings, and made a nice hat to keep it all locked up. Next job is to work out the best way to mount the ball nuts.....X is no problem, but the y will be a little more tricky since I have big nuts
and not a lot of room under the table.