I've got an area of my kitchen where I'll be removing plaster walls in order to insulate, add wires, ductwork, etc. On one side, the area to be removedwill be contiguous with some that will remain intact. In another, it'll be removed to a corner. I don't know yet how thick the existing plaster & lath are, but I suspect it won't match any standard drywall products. If the plaster's thicker than the thickest drywall available, what's a good way to make this work? Shims on the beam edges before installing the drywall? Prayer?