I have a S4Pro with the stock Z plus. If I push up at the bottom left of the big plate (where the spindle bracket is mounted), I can see that the whole thing is moving up and down relative to the bearing blocks on the linear rails. If I push on the bottom right hand corner, it is very rigid (as you’d expect). Here’s what I see when I push up on the bottom left corner:
I assume that I need to remove the 4 screws holding the plate onto whatever is attached to the bearing blocks and then tighten the screws attaching the underneath plates to the blocks?
If so, is there an easy way to do this?