I just purchased a used ATS 80mm and was going through this debate. I've settled on either carrying it in a dedicated pocket or a case just for inside the pack. Most SOCs end up catching more wind during glassing sessions. Also saves some money.
I tested some different rope tonight. Unfortunately all I could get my hands on this week was some 1/8" hollow braid Dyneema. I figured it would be 'close enough' to 7/64" max Dyneema diameter recommended by Wiser but it ended up having really high friction in the Pynch pulleys. I would not...
I don't think I missed the point.
The first graphic shows the efficiency of various pulleys using the same 1/2" static rope. Slung over a carabiner produces very low efficiency (53%) and using a 3.75" diameter sheave produces up to ~91% efficiency.
The second graphic compares steel and rope...
UPDATE:
I'm in contact with Wiser to see if the ones I recieved are faulty in any way. BTW they have been incredibly supportive and great to deal with so far.
I recieved some of the Pynch Pulleys and did my own testing for efficiency. They didn't impress me. See below:
I setup a 2:1 and 3:1 in a block and tackle setup using good quality 550 paracord. I was pulling down to lift a load of 50lbs (rove to disadvantage) just like I would to hang quarters...