Appreciate that as I was looking to order the Diono R100. Still likely to get it as it does not affect the way we would use it at all and I was told when I called customer service that it would just required a kit that they would send out. Mind if I ask you which model of seat and model of Tesla you have? How do you like the fit? Been reading a lot of forum entries and its been kinda 50/50. Some complain that the Model S' headrest is dug into by the top of the booster seat and that there is a gap between the booster and the actual back of the seat. If your seat fits better I may order whatever model of booster you have. I'm still awaiting my MS to be built but trying to get my ducks in a row before delivery time comes so I can just enjoy my car as soon as it comes. TIA.