We hope to use our model 3 to get to the mountain for skiing. I know you try and use the 60/40 split and push two rear passengers next to each other, but having the skiis, 2x4', or whatever long thing down the middle can give the rear passengers more room. Does anyone sell an aftermarket kit for a ski pass through or done a DIY project that has done this with a Model S or 3? I didn't find much in my internet search, but maybe most people just decide to strap on whatever long thing they need to carry onto the roof. I'm assuming that because the Model 3 has a center arm rest/cup holder that you can pull down that there isn't much structure in the seat back there, and that a sawzall or other cutting tool could make the opening rather quickly. Keeping it look clean is a different story.