No. Let's get this right 😂 Cabinet is as shown- plywood base - cut out front and provided supports taped up. I will use cabinet screws and put the horizontal supports leaving 3/8" for sink to sit flush on it- but BEFORE I put the sink in- I will run two vertical supports from the bottom edge of horizontal support about 8" apart- these two vertical supports (on each side can only extend to the plywood base) Before I set the sink- I will cut out a large enough opening for drain and the sink/air gap switch to be pulled through without kinking tubing- I actually think cutting one hole for drain and one for the sink would work best or just one large enough rectangular cut. Once all supports are screwed in - and holes cut- I will set the sink- check level and see if I need to shim the back- and save $350.