Just received my ( 2.5 Inch diameter ) "Small" Parallax Knob Expander Wheel from Stray8 and it works very well . It is made for the Sightron S-III 10-50X Scope . It's a bigger Wheel which fits on the Sightron Parallax Knob and saves Finger effort for $15 . I think some of the older 8-32X Sightrons are even harder to adjust . Brad would make these too , but he needs an 8-32X to "Test Fit " his Design . Would there be anyone around the SE Georgia Atlantic Coast or around Jacksonville who could show him a 8-32X Sightron ? TIA .