I live in a location where I have to turn straight onto a highway with no ramp and no acceleration lane (yeah I know it's a bit weird) and that means that during morning commute I have to make a hard 90 degree turn and then floor it to get to 90km/h asap so as to not obstruct any traffic. All my cars have been performance cars partially because of this interesting road construction choice as it makes quite a difference if you get to 90km/h in 4, 5 or 10 seconds in options you have to merge in. Now the thing with Model S (owned a whopping 2 weeks) is that when I floor it after I turn straight it starts to fishtail above ca 50km/h until I release the accelerator around 100km/h. It's a smooth fishtailing with the rear just going left and right marginally, but I feel it strongly in the car. I keep the wheel centered and it disappears the moment I reduce the acceleration so it's only under hard acceleration. I'm using aftermarket wheels, but I'm not sure if that could be the reason here. The car was trailered from Tilburg to Tallinn and I've heard people claim the transport might screw up the alignment. As I'm still waiting for my TPMS set for the 19" wheels I thought to ask around here for recommendations what to ask them to check when I go to the tire shop. Not sure they have an alignment bench, but maybe there's something they can check visually if everything's to the specs.