Cool! Mine arrives Monday. Question: did it mess with your burr alignment at all when you took it off the old top mount and put it on the new one? I guess there's no real easy way to measure alignment, but I guess what I'm asking is, once you dialed it in, are you getting the same resulting grind from the chute?
I ask because while I'm sure a good amount of the improvement of my 37S over my old Mazzer Mini was due to the 83mm vs. 64mm burrs, I think another part of it may have been burr misalignment. I was unaware of what that term meant a few months ago, but now having heard what it sounds like, I think Mazzer definitely suffered from it. Because even on its best day it didn't come close to the 37S. Using the exact same bean blend I'd always get a static-y result no matter how finely or loosely I ground it. And I could always hear a bit of that "chirping" of the burrs, because if I backed it off where there was no chirp, the extraction was way too fast, and in order to get a decent paced extraction it had to be at a grind setting where there would be an intermittent chirp when the burrs were empty (i.e. when I'd be replenishing beans).
So I'm paranoid about messing up what I think is near perfect alignment of my 37S when I transfer the burr to the new top mount on Monday.