Spaceing and accuracy test cylinder print down to 0.15mm

This is a quick check print I have made. The little cylinders have a spaceing towards the block. Spaceing is checked for 0,30 / 0,25 / 0,20 and 0,15mm.
Most popular well-calibrated printers get stuck at 0,2mm. If you make it down to 0,15mm you are lucky.
The cylinders have additional spacing at the bottom to get the parts loose even when the first layer might be thicker than all the others.
The whole block can be used to calibrate and check the XYZ dimension as the block is 15x15x60mm big.