At first, many thanks to Ben Levi and the friendly and helpful members of Thingiverse and the Facebook group.
Only through the constructive cooperation and the exchange of thoughts and ideas across many countries and continents could I finish my "BLV mgn Cube".
Almost finished, 95%, the side walls and soundproof mats are still missing.
The wiring must be urgently revised. And the NeoPixel modules still have to be connected.
But .... HE LIVES! - The first print of a calibration cube WITHOUT fine adjustment is very good for me.
Only a mesh bed leveling was executed.
Now comes the fine tuning, I am already looking forward to it.