With xmas out of the way I managed to get some time in the shed. After struggling to get the thing onto my workbench I removed the covers.

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I was able to have a poke around and establish that it did actually have steppers and ballscrews (I was worried it had been gutted of useful parts).

The Z-axis stepper has a sticker that I hope will help me identify it.
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As far as I can make out it looks like the part number is M60STH88-3008D and it was made by / supplied by Motion Control Products.

Poking around their website ( http://motioncontrolproducts.com/) I found a spec sheet for a M60STH88-3008DF I'm not sure of the significance of the F on the end.

I've also discovered that the contol cabinet is accessed from the back not the side as I originally thought. This means I need to move the thing again to get access.

Oh and I haven't been able to release the tool holder, does anyone know if I just need to pull on the lever harder or if there's a drawbar or somewhere I can tap to break the taper?