Fixed bridge I'd say they probably wouldn't charge you. Floating bridge is a different story. If they do charge it wouldn't be anything unreasonable. Ryan is an amazing tech and he could have a fixed Bridge restrung, stretched and tuned in the time it takes me to carelessly stab the high e string under my fingernail.
Depends on the strings you want on them, but if you buy them there they will just put them on for you, possibly also if you bring others in as well
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