Defo stock.
Furthermore I have the same knobs on my my Piezo Al and I wish I could get strat style knobs to fit the currents pots. Also wouldn't it be neat to have Volume ... Tone ... Piezo etched into them?
Really? The one thing I dislike is those plastic strat style knobs, keep them chrome Spud, much classier! I do tweak their position on the post though so that the grub screw points up when they are on "10" for reference.