Simple printer calibration models

I have an Overlord Pro printer which has a lot of issues. I searched Thingiverse for a usable test model set. Finally I have found one but the files in it was completely unusable. I get the model measures and remodelled them in OpenSCAD.

Since the idea is not mine I share all the files here.

Happy calibration!

EDIT:
- Added cylinder and wall tests as well.
- Corrected cylinder walls (were half of the desired thickness).
V2.1
- Added tall and wide blocks and cylinders. Print them with RAFT.

After a big repairing of my printer I started to calibrate it again.
- The bed leveling is good, the external sizes are acceptable an every directions.
- The holes are too tight.
- Stringing is very strong.
- Some ringing and pillowing can be seen.

I had a lot of things to do but the calibration model did a good job ;-)