I know what you mean about taking things apart! I've had to do that several times so far. But, that's good for writing the manual, I go back and add the missing steps in as I go.
I just completed the Y Bearing Blocks. The adjustment mechanism is very simple and clever.
Each of the two screws on the edge engage a captive nut inside the bearing block. As you screw them in, their end pushes against the plastic axel/dowel pin of a bearing assembly, pushing it in. Simple and effective.