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I created an internal skeleton frame to keep the bag semi-rigid, works very well. I assembled it in two halves outside, then put in bag with some help and joined the two halves. Since the joints add about 1/2" at each end, my cuts were 6x22" (vertical pieces), 6x16 (horizontal pieces), and 8x27.5" for length. raw materials: (around $12) 4x 10-ft 1/2 PVC 8x 3-way 90-degree elbow for corners 4x T-shaped adapters for middle 4x end caps w/ threaded end (these will be added to the 4 tee pieces to make a 4-way elbow thingy for the middle. cutting/assembly - First two 10-foot pieces, I cut 3 x 22" 3 x 16" for each 10-foot pole (gives you the 6 & 6). - Second two 10-foot pieces I cut 4x27.5" each, giving you 8 length pieces. (I started with 28" but had to shorten to make it in the bag) - for the 4 middle T-shaped pieces, I drilled hole in the middle of it just a bit smaller than the threaded end cap to make a 4-way elbow (home depot didn't have a piece of this shape). see pic. hope this helps.