Here's some goodie for 2016.

Here’s some goodie for 2016. V Wheel Bracket for Bed for 20x20 extrusion in X configuration… The small ribs around the screw hole and at the corner is made to break-up easily and perform better than automatic support (even w/ Simplify3D). The slotted lateral hole make for small adjustment (2.5 mm x 2 if you take into account that you are on a diagonal and the symmetrical part will allow for the same amount of adjustment).
My bed is now rock solid in X/Y and Z.
Print your’s from here:
https://cad.onshape.com/documents/33a1a8c5a7134dea867c5369/w/2bccfb4697ae4ea7920ae601/e/8840548fc70e4998be2bb83b

Always great design…but How adjust position?