If it's
huge, those fakie credit cards that people send you are good, as are guitar pick slivers - I don't consider shimming the
sides of a pocket to be a negative, some manufacturers like to shine on how their tight pockets increase sustain & tone & world peace but if that was the case, what are the screws for? :hello2:
Somewhat thinner shims come from the plastic in packaging for tuning pegs, strap-locks, printer cartridges, electronics crap etc., I'd guess it to be about .022" - .025"? It's clear, so you can trim it down and cram it into the slot with the screws slightly loosened, and in a few minutes you'll forget it was there.
Save stuff like that - Confucius say, "You're only as
good as your parts box." Some truly primo shims are the similarly stiff, clear plastic that's stuck on the backs of birth control patches, nicotine patches etc. - ask your wife/squeeze/girlfriend/boyfriend* to save you some, It's about .003" (?) and you can stick it into the side gaps to keep everything perfect.
*(Speaking of "shine on", if your
boyfriend is on birth control you need to go re-take high school biology or sumptin'.)
icon_tongue