I was recently actively defending that for dual-use purpose Model 3 doesn't need more than Schroth Quick Fit 4 point harness. While it tremendously better keeps your ass and allows you to turn a wheel instead of holding to it, it's not really helping you to properly feel what happens with a car on the track. So I'm considering building a race seat that can be used daily. Here is the idea and I'd like to test with you guys to see why it's bad or if a better one can be found. Use FIA 8862-2009 certified bucket seat with certified side mounts. Nowadays they already around 3K USD rather than 10K as before. Those are VERY rigid seats with a very strong defense that I believe compensates enough for the loss of side airbag. Design removable foldable 4 point roll bar for the harness similar to UPP, but with the additional brace for 2 additional hard mount points for the seat - it's a safety thing and more important it transfers car movements better to feel what is going on. Remove stock paddings and DIY custom insert with BSCI compounds I expect the following problems: It will be really hard to climb into the seat. What helps is an easy entry that slides steering wheel up and I need to see if I can reuse stock seat motors to do angle adjustment and forward movement. I also expect that since seat will be lower - it might not be that horrible in general. Stock seat functions lost It's certainly possible to reuse stock seat heating and with proper prepping, I'm sure I can do some seat ventilation in the insert and stock pneumatic lumbar support cushion for the longer trips. Side visibility. Since I don't need stock cushions and actual FIA certificate - I can cut some of that head protection carbon based on actual results. To give anyone else a car to drive. Custom inserts are quite hard foam, so they really only work on the same person. Anyone else feels incredibly uncomfortable. But stock padding can be kept in the trunk for that purpose and having front/rear movements and angle adjustment should work. Passenger going to fly around. I know most guys do both front seats. FOr design and for a passenger. But I believe it's an overkill considering the cost of the seat and I can just do white front upholstery to make it not look completely odd. If it's fun drive - race seat is not needed and the stock seat is much more comfortable for random people there. And if it's an actual race I tend to save weight and decrease the chance of injury and guilt by driving alone. An alternative could be to use the same brand similar-looking street "race" seat. Need to fab support for 3 point stock harness. What do you think? I know most in the Tesla community still at the level of considering lowered springs and we have very few people doing actual track mods, but a lot of people coming from other platforms, so I'm very interested in opinions.