Don't know about the brackets, but the headrests are definitely going to be a problem. I'm 6'4 and they're not high enough for me. Which seems inconsistent given that I've got leg room and head room to spare.Also, don't forget that Elon recently tweeted a response to Kristian Nairn (Hodor on Game of Thrones) recommending an X. He is 6'10" and 370-400 lbs.