Great looking mod! I wish I had the skills to do mods like that. I also struggled with the straps with my Nomad before I had enough and sold it. One of the ideas I had was similar to what you did, but instead of a zipper just add 3-4 tab loops to each wing in place of the zipper. You could then add a similar strap setup as you did (but without the zipper), and you could also connect the wings using only double slotted K-klips, which would hold the wings together without straps.