Official comment
@Stephen > Nope, the DJM-750MK1 is rekordbox-ready, and supports DVS without requiring any additional hardware. Just purchase rekordbox dj and the rekordbox dvs plus-pack (try it out for for 30 days on the free trial), configure DVS, and you're set.
As you're using CDJ-800MK2's, you'd just need to download the timecode WAV and burn it to CDs.