The maple screw I ordered from the US arrived last week, it's beautifully machined and I'm looking forward to working on the tail vice.
I've given the threaded parts several coats of danish oil in accordance with the instructions on the manufacturer's website and will wax them for smooth running prior to final assembly of the tail vice.
The hub and handle have had several coats of wax, I chose a simple wax finish for the exposed parts to keep them as close as possible to unfinished maple - bench tops here are typically left unfinished.
I picked up a nice Record 52 1/2 quick release vice on Ebay a while ago which will be fitted to the bench before making a start on the tail vice but there's a lot of work to be done before that...