Posted by JasonB on 16/11/2017 18:46:55:
You do also have the Britan rep lathe, where as us poor soles with just one lathe have to keep swapping between R/H tool, chamfer tool and parting tool when making say a batch of nuts. And it is not just the height that a QCTP helps with but it also puts the tool back in the same position so you can use the same handwheel or DRO setting each time you swap tools rather than having to measure each time as you would with a 4-way.
If I had to do that to make a batch of nuts I'd have gone nuts, and taken up knitting a long time ago. 
I don't recall the change of length ever being much of an issue. I tend to use a single tool to do the same operation on each part and then move onto the next, if possible. I don't have a DRO on my lathe, it's just not sufficiently useful to me. On the mill yes, the best single item I've ever bought, but on the lathe no. I suspect the DRO scales would rather be in the way on the lathe, whereas on the mill they don't limit anything.
One thing I like about my particular toolpost is that it has an index plate underneath, every 9° I think. So I can swivel the toolpost between tools, and for adding non-critical chamfers, and be assured that I can reset back to the original position within a thou or two.
Andrew