olderdan,
I, personally would feel lost without a DRO on the Z axis. That is the most important axis for me. I can zero the display at any point with a push of a button and easily watch the display for machining to an exact dimension. I have been using Trav-A-Dials and DRO's for almost fifty years and it is second nature for me and is very precise. Just my opinion of course.

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