Stepper motor moves short, but only on first “step”

I found the solution!! The problem was with my nuts! Let me back up.
After I switched stepper motors with the T-shirt, I knew it had to be from some other part of the system. So I ordered new belting and saw they had an eccentric nuts upgrade kit, and I ordered that too. As I waited I came across this post: Is that what they call "BACKLASH"? is it Normal? - #5 by JocelynBouchard, which discusses loosening the eccentric nuts and messing with the voltage.
I loosened my nuts and instead of being .012 short on the first step, it was .004. Whoa!! (I never touched the voltage for the record)
I installed the upgrade kit, which allows for tightening the lock nut independent of the eccentric nut. This removes the temptation to over tighten to keep your nuts from getting loose and let’s you dial in the v-wheel tension. I’ll see if I can get under .004, but for what I do, that’s good enuf.
I hope this helps someone out there…happy cutting!

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