my time there...and i learned a lot with this guy, so i don't consider that a cost at all.
he did it for free.
he's an older guy that runs a small-ish shop with his 2 sons. it's not extremely state of the art, but has some pretty impressive stuff. i was in there for probably 2 hours - it took him a long time to figure out how to a) hold such an odd shaped piece of metal like a UE knuckle, and b) how to get the extra 1mm that was taken out to be perfectly centered and true, and at the correct depth. he told me he just likes to putter at small jobs like that for the challenge, not the money. needless to say, i thanked him profusely.
since that time i managed to find newer 16mm knuckles, and sold the old set off lol.