Dear ThemeLooks,
Thank you for your reply. We indeed cannot customize the product grid offered by Karton to our liking.
However, the product archive element is not responding at all to the changes applied to it as a result of the Karton theme.
Therefor we need to have one of the two, a better fit to the karton product grid, or a fix on the product archive.
Thank you for your time.
Kind regards