I'm not convinced they'd be worth my time...If I'm milling, I only have about the width of the table in travel...And turning anything long (like a rifle barrel) I can eyeball until I get close and then run it in by hand...My cheapo machine has [variable] x & y axis feed, so I don't need the power drill feed...Although if I could run the drill slow enough, it might be good for tapering pistol barrels (running the toolpost feed to make my taper)...
I do see why Travers DROs are ~$799; they're self contained. No problem with chip or fluid contamination.
I could easily mount the 35" DRO on the backside of the 3in1 lathe frame; the 12" crossfeed DRO would have to go on the left (gib locks are on the right)...Have to see what comes up in the future as to what benefit DROs would be to me...
Thanks for the pics, ideas, and insights!!!