funny answer to the question about what is holding the guttering. I had some of those glove hooks, ya know for the kids gloves~coats. My kids don't use anymore so wrapped them around the shelf and clipped on guttering...worked great. for the lip thing on guttering what I did was took and pulled ribbon through and then put a dimensional dot on each end so it would give space and still stick works great and can always change if need be. thanks for looking.