The base was too high.
I didn't want the filament under the printer.
So I "cut off" the base without further ado. (approx 32 mm)
The building instructions are basically the same as those shown in the blog.
https://blog.prusaprinters.org/enter-the-mini-base_50290/
The upper inserts are still original.
UPDATE 19.09.21: adding PSU Holder
UPDATE 25.09.21: adding Z-axis support
Maybe you have ideas to attaches some things.
Front legs
Rear legs
The author remixed this model.