I've been going by the amount sticking out when I put my hands where they "want" to be. Which I can't do when I'm riding, cuz my hands "want" to be on the shifter housing. That leaves a whole lot sticking out beyond my hands. I suppose I should take it easy and only get an inch taken off each end. See how it feels when I actually ride on the shorter bar.

Ah, me, I want instant gratification!

Thanks for the voice of reason!