My second hand Chester Conquest Super came with DRO on Cross and Top Slides.
My only problem on a little used machine was that when it was needed, the batteries always seemed to be flat!
The screws retaining the battery covers are small (and so easily lost), and I had problems obtaining batteries..
A pity, since the DRO gave the choice between Metric and Imperial readout (On mine, the Leadscrews appear to be 20 tpi, if the DRO is to be believed, although the main Leadscrew is 1.5 mm pitch
Chester quoted £100+ to convert to analogue Metric, involving Dials, Leadscrews and Cross Slide..
Eventually, Arc supplied a kit for half that price. STILL not fitted, having obtained a supply of batteries..
Maybe conversion would be the ideal opportunity to modify the new Cross Slide to take a Rear Toolpost, (and to make one? )
The restriction is likely to be the Cross Slide hitting the Splash Back, but that is a bridge yet to crossed.
Howard