Hi V,
Your thread prompted me to become a member (after a long time casually reading).
The american link i posted did it rigorously. He bought over 2k of equipment. A chatillon ametek force gauge. And a frame. I think he fishes inland so his knot choices not so helpful (eg no FG vs PR knot)...
I don’t want to fork out big $ on a force gauge. I may not have to either...
I came across a great guy at this company:
https://www.test-measurement-australia.com.au/
Instead of buying a force gauge with lots of unnecessary features, he is putting together a simple system with approx 3 components that i can drill onto some marine ply and make a jig.
bottom line: 0.3% accuracy. 5-10% the cost. They will test the system, calibrate it then send it to me. To buy a force gauge with 0.3% accuracy would be thousands.
I’m glad you persisted. Saw some unhelpful comments through the thread...