They actually make belt tension gauges? Thought that was just a myth at the counter.

Foot powder trick works because the powder settles into cracks and shows the oil seep. Try it on exhaust manifolds too, cracks show up fast that way.

Switched to flex: 0 0 300px on my last project and never looked back, basis finally did what I told it. Also learned the hard way that height: 100% on a flex kid is just asking for a bad time.