What is your application for the zipper?
I have a gear bag similar to yours and hang it so its accessible from the entry slit. I also have a 3' long gear loft I made with 6 sections to it that hold my water bottle, glasses, headlamp, keys, wallet, and reading material. I was curious how you use your zipper and gear bag. What do you need to retrieve from the gear bag once you're in the HH? I know everyone has their own "system" so was wondering if I can improve mine from your experience. Thanks.:)