Most visitors online was 1990 , on 7 Feb 2022
Sorry, I should have followed with mm.I'd suggest some units of measurement be provided...I'm a little confused! Henry mentioned his spring was 0.0025 thick and Tinker suggests a spring of 0.051 thick. That's quite a difference. I suspect Henry was using inches (0.0025 inches is 0.0635mm) and Tinker's was metric (0.051mm is 0.002 inches).