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Wow! A lot of information in that pdf. Unfortunately, I think I just suffered from a mathematically induced blackout.

Thanks for posting that, Kenny. Even though this highwayman variant has been around a decade, I have somehow missed it. I use the original often on short redirects and it has served well. It is interesting that the load end reverses. That is something I might like.

. The Porty is a funny tool for defining how a round turn works because it tilts off axis and, therefore, changes the whole dynamic. A strap-on bollard might be a better choice. I understand your thoughts on the counter force of opposing half circles but that is not how I think of it working...

A 360 round turn works very well without the 180 if the line remains perpendicular to the cylinder.

That was one of the best explanations of why a single and nonmoving overhead pulley has mechanical advantage for a climber. It is amazing how often this is still argued.

Nice!

You always have such great information. Thanks for posting that.