All the ball screws, nuts and pulleys arrived in pretty short order from Fred at BST. He was exceedingly helpful with my questions, raised issues I hadn't foreseen and coped with my hand drawn diagrams admirably.

I got given a really nice control box donated from a friend, unfortunately I'm having trouble uploading the photo, I'll try again later in the build when it's been repopulated with shiny stuff. I'll post a list of the hardware I've bought for the control side at the same time.

I've been milling out the X and Y ballnut holders from the old brass acme leadscrew nuts. The Y nut was clocked from the front of the table as being 0.002" out of square so compensated for this in the vice on the mill then faced and bored the ballnut hole and bolt holes. I ran into some problems in the process on the second mount as evidenced in the photos below. I had a cutter slip in the collet which accounts for some of the problem, the other marks in the bore are a result of the previous threading showing through but the final mounting hole is true and the otherwise ready to start the fitting of the ball screws.

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I will get a good bit of extra table travel in the Y axis towards the column as dazp1976 says above on his similar machine.

On final disassembly of the old Z axis bits I found that the damper had long since given up the ghost - I wonder whether to get another or just rely on the power of the stepper?