Summary This plate is LEGO full compatible. The thichness is the same as a flat LEGO part. Original LEGO stubs diameter is 4.8mm In the initial file stubs diameter is 4.75mm. It's because very often FDM printers are giving shafts with a small positif gap. I added a file with 4.8mm stubs diameter. I added also small parts (2x2) with the 2 diameter to allow you to perform a trial.