".......I am on a bitof a learning curve at the moment........"
A few lessons I learned:
1 - Get a good, solid base-board which isn't warped. The local timber yard
may have off-cuts of 3/4" ply. You will want to assemble the mechanics on a proper base, and it helps to have it available first. You will want to paint it anyway, so it will need time to dry.
2 - Get a dial indicator. An easy way to check for precision in assembly is to attach a dial indicator to the end of the Z axis and run it over the base board. It's good for other fault-finding and calibration as well. There are cheap ones on Ebay.
3 - Plan out all the wiring. I put my limit switches in as an afterthought, and found that I had wires which couldn't go in the places I wanted them to go.
4 - Wiring loom control. Consider Drag Chains, Heat-shrink tubing and Braiding. All items
are very cheap from Ebay. If you don't put the wiring in at assembly you won't be able to put it in later once everything is connected up...
5 - If you use a drag chain for the USB connection, you will either have to make sure that it's wide enough to take a USB plug passing through it, or cut the plug off, pass it through and re-solder it afterwards. If you do the latter, note that the shielding in a USB cable
is aluminium, and won't solder. So you will need to use a connector plug
which has a physical connection to the shielding, because interference can ba a problem on these machines