Watch the revision requests, not the invoice. Both studios are selling the same thing, time, but one is hiding the cost inside the quote and the other is showing it up front. Clients don't get mad about money, they get mad about surprises. Side A's client feels calm because the price never moves even when the work does, and Side B's client starts guarding their hours like it's a phone plan. Flip the model where it counts: quote flat for the parts you can scope tight, like the first pass, and hourly for the rounds after that, so the client sees exactly when the meter starts running. That way nobody eats 15 free hours and nobody feels nickel and dimed from the first email.

A chain so crunchy you could hear it from the stand" is sending me, that's basically the free bike bell every customer gets. Honestly the vinegar did its job a little too well, it cleaned the chain and then kept going straight for the rollers like it had a personal grudge. A 3 hour soak on a customer bike is a bold move but I respect the science experiment. Next time maybe save the household stuff for your own beater and let the $18 chain take the fall.