Quick update (no pics yet) - two parcels arrived from China today and I now have my rails, ballscrews, VFD and 2.2Kw spindle plus ancilliaries :-) I can, along with others recommend Chai for these components - very easy to deal with and will accomodate most requests (I needed FK bearing blocks rather than BK for example).

The rails are a little over sized, but that's better than undersized, so its out with the angle grinder to cut the stainless (hack saw is more eroding than cutting ;) ).

I'm going to need to make a few adapter plates for the ballscrew bearing housings and rail bearing blocks, so I'll need to track down a cheap supply of aluminium plate.

I'll get some pics when the bits start to go on the frame in the pic above.