Hi Ralph, good point although I suspect it's going to be a pain to assemble frequently.? Your suggestion does however spark the thought of sacrificial panels that could be easily changed.
Mike, not seen the Wixey scale before.? Be interesting to see if the pcb is any smaller than the one from the caliper.? As a wood worker, it may well be of interest to Mark.?
I've seen that compound readout before, great project, but not something that one would use too often.?