The Top  Board 
This is another simple board.  Start by cutting a board 20" wide x 7-15/16" deep (see A).  Next you can just place it atop the ledgers and admire your handiwork.  We'll eventually be attaching a marquee retainer to this board, as well as the light, but that will be a little later.  You should see a nice, sharp edge where the upper-back meets this top board, as in picture B.

 

The Top construction photo
A
The Top construction photo
B
The Top construction photo
C


Take a breather as the next step can be very aggravating.  We'll be tackling the construction of the drawer on the next page.