I have an existing rough hole 13x11 in 3cm granite
I bought a semi-recessed copper sink with a 1.5" high apron. Bowl does not rest against the 13x11 hole - only thing touching is the ~17 guage couple milimeter thick apron lip.
Would very much like to know how to attach to counter. So far the only information I have is to run a bead of adhesive caulk where the apron touches granite. I'm beginning to be concerned that it might not be possible.