Ed said there isn't much of a selection when it comes to aftermarket accessories for his Subaru Baja so he made his own bed rack!
Charles K Spence I think he mainly uses it as an extension like you were saying. You could definitely build a version designed for a rooftop tent though. If you want to post a photo of your tent and start a discussion describing the features you want it to have we can give some input.
I have a Baja as well and understand all to well the lack of items to the orphan child of Subaru. I completely sympathize. I was wondering if this Bed rack was designed just for ladders,surfboard,kayacks, etc.? I am considering building a rack for mine but my goal is to carry a roof top tent. Like the design but was intrested in feedback as how well it works for use. Thanks in advance