Hi Petr,
I'd linke to inquiry about a customisation of datakick module.
We mainly use it to create custom fields for products. We want to expand this with dropdown-fields in combination with values and some further calculations.
Are you interested? Maybe we can have a skype/slack session where I present an overview of our needs to give a better idea.
Greetings from Vienna
Best, Chris
c.zauner@weekend.at