Totally get what you're saying, but I'd push back a little. The "where" is just another part of the "when" in my book. That hill on his route is the specific condition that made the problem show up. It's all about finding the exact situation that triggers the issue. I've seen similar stuff where a pothole on one specific street would make a weird noise, but only when the engine was cold. You're right to dig for those details, but I see it as tightening up the "when" question, not a totally different thing.

Wow, heard that happens with prop guns too.

Wait, he actually worked on Apollo?

Wasn't there a tech sheet that said too much flow can mess with the spray gun pattern? It makes sense if you think about how it would blow the atomized paint around before it lands. I should really check my own booth's numbers now.

Been there. I grabbed a similar one from a big box store, and the clamp wouldn't hold the teeth straight. Ngl, it turned a simple job into a huge mess. I only trust the old Foley-Belsaw manual jig now, it's slow but never lets me down.