Here's a bit of the process I used to build the closet and cut the plywood face for the closet. I used cardboard and painters tape to create a template to use to outline the plywood for cutting. I built the closet with two shelves. The shelves are split into two pieces so that they can all be removed from the closet to gain access to the water tank if necessary. I used a multi-tool and a rotozip with drywall bits to cut out the plywood face perfectly around the 2x2 framing.