TLDR

• LEGO motors are shitty or too-old or pretty expensive, or all three

• Direct motor-selling brands (like Pololu) afaik do not have a direct adapters compatible with LEGO - and that is the window of opportunity IMO.

I am sorry but the forum post text box is deleting parts of my message :), so I added it as a text file

Oho, so I you already had the idea :)

Elektro sada - dílky pro uchycení různých motorů

Nice.