I think I've only had to use Vortex CS once. I've owned Razor 10x50s, Razor Gen I 5-20, Razor Gen 2 4.5-27, two Razor Gen 3 6-36s, both a Gen 1 and 2 PST, an LHT 4.5-22, and a couple of Razor LH's. The CS was used on the PST Gen 1 since out of the box its illumination didn't work.
I still have...