So I just picked up one of those car top tents that were on sale, and now I need to think about a roof rack. I have Yakima bars to hold me over for a while, but I am starting to design one. I like the Hannibal rack style(open front w/ detachable sides and full gutter length mounting bar supported by 4 clamps on each side) and am going to copy it mostly. I wanted to ask everyone what the thought or would want. Here are some things I have been thinking about... Steel vs. aluminum Square vs. round tubing Mesh floor vs. channeled/flat metal This will be an expedition full length rack. Any ideas/ comments will be appreciated.