I did not. It's pretty easy to check - if the cylinder has any pitting at all - you should repair or replace.
I'm not sure that the cost of a 57 MC is, but for my AD it's about $100.
Yeah.. mines around $120 which isn't too bad, but it's $120 I don't have, considering I don't even have a battery for the truck right now ;-P so if I can rebuild it, I'd have to skip with joy. I looked in the cylinder itself and it looks like a baby's bottom... no imperfections that I can see

If I'm not mistaken, rust would have to be present to cause the kind of pitting we're talkin about? If that's the case, when I first opened it up it looked straight outta the factory (clean metal wise)