I'll sell you my roof rack and throw in the hard top for free
CJ/TJ Black Hardtop - JeepForum.com
Seriously, I'm not trying to turn this into a for sale post...you can see in the pictures what a PO did. It's actually very secure with just four bolts. I personally wouldn't use it for anything heavy like an ice chest, but sleeping bags, other light weight items, etc, would be fine.