Rob

Thanks for the response (and I like the cheese from up there).

As it happens I hijacked somebody else's thread over the weekend and have been advised to consider using only 3 limit switches, set them up as a "home" position for the spindle and use soft limits for the ends of the x and y axes.

With there only being 3 limit switch connectors on the GRBL board, this could be what was intended, so I thought I would give it a try before cutting any wires.

It will mean more reading up on t'internet, but I've got a bit of time to fill until The Star (Thrussington) opens again.

Cheers