Sorry, still one more question:
Is there a way to automatically trigger and insert the 2nd unit, when creating a sale? - At the moment, I need to separately type it in when creating the products to be delivered, I don’t really know why that’s necessary.
From my limited viewpoint, I cannot see the disadvantage to always have the 2nd unit info, once I decide to use that module.
Later, when it comes to make use of the data, I still can decide, e.g.: