I have 3 pins on mine (20, 30, 40).
I would only use 2 (20, 30), but the Cobra sight that I like to use is a pain to take the pins out of, so I just left 'em in.

I wouldn't bother with a 10 yard pinunless you are shooting way under 200fps. IF you're over 220fps, I think 1 or 2 works just fine.

I can see why hard-corecompetitive shooters want more pins, but I shoot 3-d for hunting practice, and I want the same setup I have for hunting.