I recently ran into this question when NASA said my cage would be illegal. They state the tubes must be one piece with bends and NO sleeves/miters. But even from a distance you can see almost no TT's are built this way. It truly depends on who is doing the tech and what exactly the rules say. But like barge says if multiple tubes land in one spot and support each other it will hold upDon't most race orgs require bends for safety cages though? Not to say that that means they're stronger, just that that would make it a non-question in my book.