Hi Phill

When you say Z height setter do you mean tool height to the top of your work piece or machine table?

If so the best way I have found is a touch plate connected to the Mach Probe input.

The one I'm using is the Aussie one off the CNCZONE easy to set up and very accurate.

If you want any more help just give me a shout.

Andy

PS where abouts in Derbyshire are you? I'm on the Notts Derby border Junc 28 M1