Fwiw I have several friends that have broken driveshafts recently on both 2014 and 2015 cars. The 2014 manual says to run 3 oring limiters on the shock shaft but my 2015 manual shows no limiters. I recommend running at least 2 orings because depending on roll center and camber the bone can bind on up travel in the outdrive and break the bone or outdrive with no orings. A friend broke another bone at the track yesterday and I looked at his car and he has no limiters and you could see the marks on the bone where it was hitting the outdrive. And he was running middle width, so it doesn't only happen when running narrow.