I installed a SINO SDS6-2V DRO from CDCO on my 13/40 lathe. As has been noted, the included manual leaves a bit to be desired. Therefore, I have undertaken the job of trying to rewrite it. My efforts to date are attached as a pdf file. I'm hoping that others with more experience might help to edit it for accuracy. Also, there may be more information than I have been able to squeeze from the manual. I did not try to do the section on the tool storeroom.
The Y axis on my DRO has the decimal point located in front of the inch digit instead of after it. I cannot find any information about changing this. The X axis is OK.
Other than that, I am rapidly growing quite fond of this addition to my lathe. It saves a lot of time, and is very accurate.
Oops, sorry. I guess I cannot post attachments. If any are interested, please PM me and we'll see if we can find another way to get together on this.