I made my korker box & it works great. I cut off the end of a 2 by 4 & drilled 4 small holes large enough to fit dowel rods in & then cut a shallow line (with my dremel) between the dowel holes I drilled to hold my elastic cord. Took less than 10 min to make & works perfectly. Easy & cheap solution. Just thought I would share. (My husband did most of the work but it really only took a few minutes to make.