I just assembled mine today. The 2S works very well. I really can't imagine someone needing to adjust it once it's set, but if you need to, it's a royal PITA. You really have to take the entire thing apart and hammer out the bearing. I set mine almost at the max crush. I didn't gap it, but I set it just a bit wider than the min. If the min truly is 25 mil, then mine is likely 30 to 35. It is crushing as well as my old corona mill, but it's evenly crushed, faster, and with much less flour.
I didn't want to start a new thread on this, but I wanted to give some feedback to the folks searching.