Just installed the Ebay Audi barz and Amazon UK Thule kit trick. Not bad for the money. The barz and locks are not as finely crafted as Thule, but for the about 1/3 the money, I'm in 8' or longer hauling buisness!
Yes, due to the fact the barz are only Just long enough to work, its an either/or situation with the end caps and locking covers. Also take note... one of my Audi bar mounts had a molding imperfection that I have made the Ebay seller aware of. We'll see if he takes care of it.