Repeat minimum rules

Hello there dear support team!
For efficient packing I need to repeat the minimum purchase rules. I tried the “Repeating Groups Quantity” feature, but it does not give me the expected result.
I need to know if this feature works before I buy the pro version.

What we need:
Minimum quantity of products in cart: 4
Repeating Groups Quantitiy: 2
Sum of all products in cart: 4 or 8 or 12… -> oaky!
(Sum of all products in cart: 4 + 1, or 4 + 2, or 4 + 3 -> not okay)

Test:
Sum of products in cart 6
Product 1: 3, Product 2: 3
Plugin says -> okay!

Is there a way we can enshure sells of 4, 8 or 12 or 16 products – no matter what kind of product or category?

Thanks in advance!
Benedikt