@Ellen Allard My sink is from Havens Metal. Havens Metal When I was remodeling I did a lot of research on copper sinks once I decided I wanted one and so I knew that I wanted a sink that had a living patina and not any kind of artificial factory patina. The sink is expensive - a luxury but I love it. The other maker of high quality sinks is Rachiele and they are equivalent. Havens actually fabricated the Rachiele sinks for many years until they went their separate ways. When I purchased my sink, Havens was about $1000 less for the same configuration. The quality is equivalent but Havens is a slightly larger operation and makes more than sinks so they have economy of scale to some degree. I do have a less expensive copper sink in my guest bath with an artificial factory finish. I was fine with that because it just doesn't get the same kind of wear from people washing their hands a few times a week. That sink is from Premier Copper Products. I mention them because they do have some great copper stuff that is well priced. My hood is a custom job from them and they also did a custom copper medallion my designer sketched for them. I also have some copper tiles from them interspersed in my back splash as well as switch plates. Premier Copper

Did you order an apron front sink base or just a regular sink base? A regular sink base's doors are too tall for an apron front sink and when one retrofits an apron front sink into an existing situation, they usually eliminate the doors and put in a curtain under the sink. If you want a farm sink, and haven't ordered a farm sink base, then stop the order, pay any restocking fee, and get a farm sink base. In the end, it will be cheaper and look better than attempting to hack into a brand new sink base.

Well it's all about dimensions. If the ID of the cabinet is greater than the OD of the sink + space for the clips (that hold the sink to the underside of the cabinet) then it will work.

A 30" sink will undermount in a 30" cabinet if the sink is strapped, not clipped, in place no matter what the sink manufacturer says.