Side Board based on your planked sideboard plan
I modified this sideboard from the Anna White plan that used 2x4s and 3/4 inch plywood, by substituting select pine 1x4s for the face frame and 1/2 inch maple veneer plywood for the vertical partitions and shelves. Vertical partitions were inserted into dadoes in pine 2x4 cross pieces joining the two base 2x4s. The end pieces and doors were made with tongue and groove joints using 1/4 plywood and 1x4 or 1x2 frames. Next was addition of the face frame(1x2s)and base. The 1x4 base covered up the 2x4s, and was mitered at each corner. I used ball bearing slides to attach the drawers, made of 1/2 inch plywood. I painted the carcass with a latex paint and purchased 13/16 inch Cherry boards to join together to make the top. The drawer fronts where made from 1/2 inch plywood, with rabbitted pine edging added to match the doors. The Figure shows the finished side board with hardware installed.