Needed a way to hold the PRINTinZ plate for my Printrbot Metal Plus.
Printed 4 clips to hold the plate (to help it being held down).
And 2 x 2 clips to block moving on X Y axis. I unscrewed some rail holder, and used longer screw so I could use them to hold those clips.
The 2 clips named spill are designed so that they can go over the printbed and push on the PRINTinZ plate to hold it, as the plate does not have exactly the same dimension as the print bed.
(You might need to increase the size 10x)