Unless you're LBS is friendly enough and will to do jobs while you wait. That approach could cost a lot more, in the long run, than buying a second torque wrench, and may leave you bikeless for a day or two.
@Cranky started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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Unless you're LBS is friendly enough and will to do jobs while you wait. That approach could cost a lot more, in the long run, than buying a second torque wrench, and may leave you bikeless for a day or two.