We did a custom quartz countertop with undermount sinks and used European-style (non-IKEA) plumbing from Duravit so the drawer did not have to be modified (and because I wanted wall-mounted faucets). Here's our explanation with products we used-- created a guide because I had looked EVERYWHERE for directions! https://docs.google.com/document/d/114GUfaGZ_rN4Zcfi8XBPu1nqLjEAw8WCp0ex0Xt1E5M/edit?usp=sharing
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