Use off the shelf hardware to make a replacement long thumb screw (thumb knob) for your GoPro Hero, Hero2 or Hero3. You need (1) 10-32 x 2″ thumb screw, (1) 10-32 x 1″ nylon tapped threaded spacer and (1) 10-32 x 1/4″ nylon tapped threaded spacer.
https://www.universalgripco.com/#!rope-grips/ik1vs
A quick demonstration of how to use 100kN Rope Grips for high strength tensile testing of carbon steel wire, industrial yarns, tire cords, and other types of ropes and twisted filaments.