I have a composite "Silgranit" drop-in sink that has developed cracks, and I want to replace it with a stainless steel sink.
The original has an outer size of 20½x31 and I want to install the same dimension but in stainless.
The issue I have is that the hole in the laminate countertop opening was made for a composite (19½ x 30 red outline) but a stainless needs an extra 2 to 3 in the back for the faucet and taps to hold on to, an opening of about 17x30 (blue outline).
I don't want to start over with a new countertop.
Question: What is a reliable way to install a piece of material to allow the fixtures to be mounted?