Here is the next step on the cabinet. I turned it over and switched out the top and bottom plywood. That is a 4ft flouro you see in the middle. It is just hanging temporarily. I will soon remove it... I am still waiting on the flexible duct before I start the 430 light regular...

The cabinet is 24 inches deep and 4 ft wide so as to fit the precut plywood from Home Depot. I moved a sprout area to the top. I will also have the carbon canister for filtration on top... I will use the space underneath to store all the excess junk...