Hi kmccb,Dados are essentially grooves cut into the wood. Jamison is saying that, instead of using dados to hold the pegboard, use strips of wood to simulate a dado on surfaces where you need one.For example: if the doors are 5″ wide, cut two strips of 1/4″ material with a width of 2 3/8″ and a length equal to the exposed length of the inner face of a board (i.e., between the inner edges). Attach the strips to the inner face with the strips’ outer edges flush with the outer edges of the board. Because 2 3/8″ plus 2 3/8″ equals 4 3/4″, you have now created a “dado” that is 1/4″ wide and 1/4″ deep across the face of the board.Once you have done this for all four inner faces, you will have created a continuous groove that runs around the inside of the door frame (which will hold the pegboard). If you do this after the door frame has been built, just remember to add the strips to one side of the door at a time (front vs back), then position the pegboard against the installed strips, and finally install the strips on the other side of the pegboard to hold it in place.Good luck!FrankPS – For the main pegboard across the back, the width of the strips will not be equal. The rearmost strip (towards the back) will be narrow – probably between 3/4″ and 1 1/4″. The strips in front of the pegboard will be wider – up to 1/2 the depth of the side panels (4 1/2″ to 5″). The wider strips should be sized so that they do not interfere with the operation of the doors.No matter what width you choose for the narrow rear strips, they can be made from thicker material than 1/4″ for several reasons: they will be hidden behind the pegboard, they will not interfere with door operations, and the thicker material will provide more support for the pegboard.