How I installed a DRO to my Lathe.
This DRO kit came from Aliexpress:
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I got the 3 axis 1um scale set for approx £230, plus £70 for the slim 1um scale (additional item).
My only complaint would be that the small scale I got for the cross slide appears to have significant non-linear error. This is apparently common in that the ones that don't meet spec are sold off cheap. Considering what I paid, it's to be expected.

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