Kossel 3D printer (Anycubic linear delta) bed leveling

This is my first trial to correct the problem of not having automatic leveling. I tried to make it tough, but still not enough for a very precise leveling. It works, but I was dreaming I would be able to keep the calibration even after removing the bed because I had the extra nuts (the thin ones) to lock it...
Another side effect is the shrunk printing area. With the new adaptors I had to setup Cura with 150mm instead of the original 180mm (but I really don't think this printer would be capable of printing something close to 180mm of diameter).

**Hint:** if your printer is not very precise, scale up the nuts inside Cura (or Slic3r) before generating the g-code. I suggest scaling only X and Y dimensions by 101% (or scale factor 1.01).

**How to assemble it**
The Nut_counter is the first nut (from bottom to top). If you look at the first photograph, you may see it. It is supposed to lock the big, tough, nut.

Step-by-step:
1) Attach the Base to your printer (you should center i