so my fantastic fan roof vent has been bugging me since the day I installed it. I love the function but the proportions just didn't fit the little van, but I wasn't about to remove it over looks. Function first for me. Well I tried to load a long board on my rack and I couldn't because the vent lid is higher than my rack.. Well theres my excuse to fix it. lol Dug around the interwebs and found Rvvents.com. Few emails later I had a new base that was .75" shorter and a flat lid that was 2" shorter. In the end I went from 5" above the roof to a little over 2" above the roof.