i have just get my new c6b lathe and x3 mill from china
do day i have desmantel the lathe and the mill for cleaning and start to convert it to cnc
i will use the original acme screw in the beginning and change later to ball screw.
no the lateh i use nema 23 motor387 oz and gecko G540 drive on my mill i use the same drive with 2 pc 387 z and one nema 906 oz bon he mill.
i find information here and you can try this and here
hope this help you and good luck with your build
im working on a new cnc machine call MackMate and can be seen here thats why i buy the mill and the lathe so i can make part to the MM