Magnification ring lever Vortex Diamondback scope

This is a lever to make changing magnification easier on a Vortex DIamondback 3-9 x 40 scope. I'm not sure of compatibility with other Vortex scopes, but the magnification ring on my scope is ~40 mm diameter (approx 1 9/16th inch) and has a slight raised area to indicate the magnification, so if you have a scope that fits these descriptions, then this may work. I printed it in BBL PETG-HF and used a M3 x 10 mm machine screw to clamp it in place. I purposely made the hole in the model small and used a tap to cut a tread for the screw but you could use a self tapping screw instead.