The bottom pan requires one to attach channels to each side. The trick here was to find a way to hold the channel piece to the pan while glueing. I used Zap Plasti-Zap medium CA for this as it is plastic on plastic. This is the perfect glue for this process. I modified some clothes pins to hold the channel to the inside of the pan. It is important to have the pan and channel pieces trimmed properly prior to gluing. I left about 1/8" on the rear end of the pan to allow for the plywood pieces to be glued on the end for the dowels. I also backed up the pieces with a small piece of balsa to give a more solid hole for the dowel. I then notched the pieces to match the channel.