Had my Model S for about 9 month (6,000 miles). Took it in for check up because of wheel vibration during braking. I was told by the technician that I may have up to 4 warped brake rotor. Because I have after market wheels, brake warranty is automatically voided. I was told it maybe caused by wheel nut under-torquing. I always thought brake rotor warps because of excessive heat or spraying hot brake caliper with cold water. Question: Can aftermarket wheels/wheel nut torquing cause brake rotor to warp? New wheel is more open and lighter compared to the original 21" turbine so excessive heat does not make sense (I have many years of experience with after market wheels; both with wheel construction and quality). I remember braking the car hard one time, can this single event cause the caliper to warp?