Great to see there are much designers already do that pattern; https://www.thingiverse.com/thing:2887851 https://www.thingiverse.com/thing:183886 https://www.thingiverse.com/thing:245202 https://www.thingiverse.com/thing:184231 https://www.thingiverse.com/thing:2121205 https://www.thingiverse.com/thing:185371 https://www.thingiverse.com/thing:3365946

But i thinked twice and wanted to make my own with different signatures. I put 9.7x9.7x9.7 cubes into 10x10x10 holes, according to the information which i have obtained from my past experience (Connector Calibration Test).

Important note: I added reference cones for making cubes with support. That supports makes them higher from bed level and prevent unwanted adhesion at the bottom and 9.7x9.7x9.7 cubes are better calibrated for fitting with 10x10x10 holes.