Dos Perros
WKR
I use those to compress the bottom of the bag. I think I follow how you're suggesting to do it. I watched a video on their website and I think the newer bags/frames have stuff that mine doesn't have, like those clip/buckle things. I've been using the spring clips with the wire holder for every attachment point. I bought mine in 2014. It seems to get this functionality I'd have to add stuff..