i dont think playing 4 decks at the same time would sound good at all...but it does open alot of doors for more tricks, faster cutting, and more creativity.

never tried 4 decks before and i probably wont have the chance to try ever....but if i did i would totally mess around with locked grooves on the 4th deck...

1 thing with 3 decks it your timing has to be really well executed on every mix.