Okay, here are my two thoughts. First, have you considered using snake skins on your fly? You'd have it hung but could wait to deploy it until needed. This would eliminate the need for quick connect and still give you a great view and ventilation, which I'm guessing is the reason behind it.
Second, I'm wondering if Nite Ize Knotbones would do what you want. They have several pdf documents on their site showing different ways to use them. Look at the advanced app. I'm thinking you could do a center bore off the fly and do a center wrap 360 around the ridge line. The problem I just remembered is that you're using 5mm ridge line, which is way overkill. I'm using 1.75mm on mine. If you want to keep it you'll have to go with the knotbone #6.