We're going to have 2 sinks installed on one bathroom wall. One will be 6 inches lower and open below for wheelchair use. There's a wing wall at the end of it. Using frameless cabinets. At the jump down, the lower countertop butts up against the taller one, which is on a base of all-drawers. I'm concerned about clearance of that top drawer at the lower countertop. Especially with seasonal changes. Esp. in a humid bathroom.

Do we need a spacer there? We have enough knee space (42") under the lower countertop to put something there but I can't visualize what it would be and where we need it. If we need it. Knowing that cabinet makers are not perfect. And that, as Tage Frid said "Vood mooves."