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It’s a fiddly job but not major… there’s a bit of an art to reinstalling the springs that will have you tear your hair out if you don’t get it right! Sounds like a good opportunity to check condition of the brake linings and cylinders anyhow.
If you’re not doing it yourself, I’d be going somewhere else if they are quoting you more than 2-3 hours to do the job unless the cylinders are gummed up.
(Brakes may “work well”, but if you’ve got the shoes off anyhow, now’s the time to deal with any other potential future issues.)