Bottom side front panels. These have cut-outs to allow for 8"x30" cabinet doors.
Bottom Panels. These make up the "floor" of the side cabinets and sump area. These are 3/4" off the floor, because I have an A/C vent underneath the cabinet where it will be sitting.
Top inner sides. These are spaced 2 1/2" from the side glass of the 90g tank, allowing room for VorTech propeller pumps.
Top front panel. The bottom cutout is for the 90g tank, the top cutout will be the access panel (to be covered later). I sized the tank cutout so that the finishing trim will cover the silicone seams of the Perfecto tank. The upper cutout is sized to match the width of the tank cutout, once trimmed. Hopefully that will make sense to you later, when you can see what I mean.