Sorry, but I disagree. I think you overestimated what the OP understood. Based on Post #21, it appears that the OP does not fully understand the simplest idea to start with. And that was what I was trying to established FIRST.ZZ, my read of the OP's question is that he was confused about the difference between "zero" and "micro": that he didn't realize that the prefix "micro" is used because the acceleration of an object in the space station with respect to the space station actually isn't necessarily quite zero.
I think your post #11 misses that point and implies a disagreement/error where none exists: he was correct that the acceleration of an object with respect to the space station is lowest at the center of mass.