Norman,
Great minds think alike, and so it seems, do mine and yours.
I was just looking at the arc catalog for DROs. That would be the best way to go, and the quickest.
But I still like the old calibrated scale.
I'm going to add Sparey's book to my library in the near future, But thanks for the offer.
Pete and Andy,
A geared scale would work. A variation would be to use a scale on the end of the lead screw and let the readings finish at 0.166 Inch . Rather like the odd z axis scale on my X1L mill. It took me a while to realise what was going on there.
Let's see. Dividing into 166 divisions. Hmmm.
All in all, I think I'll go for the DRO option.
Thanks for the help.
Dave.
But it would be awkward to make.