Heads up about customers insisting on watching repairs
I had a client last week who absolutely would not leave the bench while I worked on their old SLR. They kept asking questions every 30 seconds and leaning right over my tools. It made me so nervous I almost dropped a tiny spring. In the end, I had to politely but firmly ask them to wait in the front. It's okay to set that boundary to do your best work.
Yeah, I just tell them straight up it's a liability thing for me. My shop insurance actually has rules about non-staff in the work area. I explain that if they get hurt or something gets damaged, it creates a huge problem. It's not personal, it's so I can focus and get their gear fixed right. Setting that rule from the start saves so much stress.
See, I'd flip that around and say safety is the focus. Losing your train of thought for a second is one thing, but the real problem is causing an actual crash. A minor fender bender because you looked at your phone is still a safety issue, not just a focus problem. That's why the laws treat it that way, lol. They aren't worried about your mild distraction, they're worried about you plowing into someone.