Quote - Even with an emty cart, I always get the error Maximum 1 allowed.

The next steps where a textbook example of how to make something very simple extremely complicated.

I had the same issue .... for me a fix was, to just add another random product into to cart. The V6 thingy appeard in the cart now as well. I later then removed the random added product.

.... how weird thigs can sometimes be.

 So, yea ... add me to list of free-looters as well. =)

edit .. x-post with jestmart.