Prusa i3 Y-Axis Bed Leveling Assistant

thingiverse

Holding the nut in place under the Y-Axis corner frees up your hands to easily make adjustments and test the Y-Axis's level. To continue: Print 2, 3 or 4, depending on how many corners you're leveling by tightening the bolts. Remove the nut, attach the assistant tool and replace the nut with it still in place. As you snug the nut down, verify it settles into the recess properly.