Random Update
Today I managed to get all the new parts, wires, etc all into one location and after a few backsteps and a spindle VFD wiring confusion (Sorted out thanks to PCW) I now have....
Movement in X and Z axis, both directions
Z limit and home working and back installed
X limit and home working (but not installed, really need to change the way I had the switch mounted so maybe now is the time)
remote E-stop switch working
Spindle speed and direction kind of working (RPM is way off, haven't done anything with the gear ranges yet but it spins up and down and reverses

Still waiting on new gears for the spindle encoder and I'll mount something temp in the mean time.
Need to tidy up the wiring a bunch as they are just loosely run over from the bulkhead fittings but I wanted to fire everything up before going nuts with the zip ties
Anyway, with all the various help from all the various people.... movement!!!
Next up, getting the spindle gears/rpm dialed in and maybe the encoder at the same time (would make it easier than using the laser tach on the pulleys...)
M