From 11 months ago, my take on that: https://news.ycombinator.com/item?id=27139705 https://news.ycombinator.com/item?id=27139705 Thinking about it now, I coul

From 11 months ago, my take on that: https://news.ycombinator.com/item?id=27139705 https://news.ycombinator.com/item?id=27139705 Thinking about it now, I could see how it started on the shoulders, where the straps of my backpack are, and on my back. Basically everywhere where (different) backpack(s) and straps thereof applied load, pressure, friction.