Tripleshot Cycling

So one night I was just sitting, staring into the guts of a busted shifter, when I noticed that the far (unused) side of the internal drive cog appeared to have steps machined into it. But why would SRAM do that? Dismantling the unit led to a discovery that I have not seen mentioned anywhere on the web... and the creation of my first YouTube video, a masterfully shaky one-take production with iPhone in one hand and a fully unscripted commentary: https://www.youtube.com/watch?v=gr7WuY7VWrk

Yes, I'm a fixer. What would you expect from a guy who proposed replacement chamois for shorts?