Slingshot Build Log https://www.slingshot-sports.com/buildlog Hardware fails. Coaches push back. Plans change. The real version of building Slingshot, including the parts that did not work. en-us Sun, 09 Aug 2026 12:00:00 GMT Nineteen messages. One answer we could use. https://www.slingshot-sports.com/buildlog/episodes/05-nineteen-messages https://www.slingshot-sports.com/buildlog/episodes/05-nineteen-messages Sun, 09 Aug 2026 12:00:00 GMT team@slingshot-sports.com (Karl) Go-to-Market Discovery Slingshot restarted trainer outreach in July. Nineteen messages produced five replies and one usable answer to the question the engineers were blocked on. V2 is real, and it's already being built. https://www.slingshot-sports.com/buildlog/episodes/04-second-board https://www.slingshot-sports.com/buildlog/episodes/04-second-board Thu, 06 Aug 2026 12:00:00 GMT team@slingshot-sports.com (Ryan & Kai) Hardware Manufacturing Slingshot V2 is designed and in production at a new factory. What changed from V1 and why, from the power chain to the optics, and why we switched fabs. We ordered the board. And we already know what V2 changes. https://www.slingshot-sports.com/buildlog/episodes/03-hit-order https://www.slingshot-sports.com/buildlog/episodes/03-hit-order Mon, 29 Jun 2026 12:00:00 GMT team@slingshot-sports.com (Ryan & Kai) Hardware Mechanical The board is designed, checked, and ordered. There is no undo on copper. While it ships, the sleeve and casing come together, and we list what designing V1 already taught us to change for V2. What we're about to find out when we build the first board https://www.slingshot-sports.com/buildlog/episodes/02-first-board https://www.slingshot-sports.com/buildlog/episodes/02-first-board Sun, 31 May 2026 12:00:00 GMT team@slingshot-sports.com (Ryan & Kai) Hardware Testing A circuit board is a bet you can't take back once it's etched. Before we commit ours, the one signal that could force a redesign: heart rate on a moving arm, and how we'll know. Could a stopwatch replace us? https://www.slingshot-sports.com/buildlog/episodes/01-stopwatch https://www.slingshot-sports.com/buildlog/episodes/01-stopwatch Sat, 18 Apr 2026 12:00:00 GMT team@slingshot-sports.com (Karl) Origin Product Two of my co-founders are engineers. Early on they asked why a coach couldn't get the same thing from a stopwatch and a good eye. It's the right question to ask before you build hardware. Here's the answer.