The frame was allowed to cure for about 6 hours. The poly glue foams where there is no pressure to keep it confined. You can see the foam at the joint between the backer board and the frame. This will be trimmed later with a knife on the inside of the frame and a router on the outside. You can also see that there are two frame member on the right. This is to allow for a space (lower right) for the cable attatchment to fit during storage/portage.