Cable, Cord, and Rope Holder

I made to hold a 100ft dog leash I have for playing fetch at parks with strict leash laws. I made three versions as my needs progressively increased. V1 has a single handle and works great for general storage. To make it more balanced and easier to handle, I made V2 to have two handles with two-fold symmetry. For V3, I reduced the width so it could fit in my backpack easier, and I included 4-notches at the corners, each with a different diameter (6mm, 7mm, 8mm, 9mm) so that I could use it to hold a variety of cords, cables, and ropes.