Yeah, just the input caps. I used 22nf and the stock on that switch (on/on all i had on hand unfortunately). Still does come in handy!
Had a bit of trouble finding those values in 9mm (easily) for the pots, so i just used 16mm in a BB size box. Left plenty of room for the switch though!
"box of crock" was the most moronic name i could think of...I'll try harder next time