I use a dial indicator on the front right clip to level my bed, so I can't use the models currently available. I made my own design that for the back left and front right screw posts. It is a reasonably loose fit over the post so it won't unthread it when you move it. 2.5mm thick which is what I found worked best for me with no slop.
PhD Student in Additive Manufacturing at the Monash Light Metals ARC Centre for Excellence.
I also am the face of the YouTube channel Make.Test.Battle, that produces high quality Nerf blaster themed content.