The only modification that I have done to my car was during last July, I had the N2itive’s Alignment Kit 1 installed which got rid of the shudder, and also lowers the car about 1” in standard without wearing the inside of the tires. The shudder issue is caused by the drive shafts being at too large of an angle from the wheel to the gear box, which destroys the CV joints. No different than when as a kid I put a lift kit in my pickup, but ended up destroying the universal joints in a short time. So to avoid this happening, you can lower the car to reduce this angle, but then the car will wear out the inside of the tires very quickly but the outside tread looks like no wear. So this kit replaces the linkage in both rear wheels so the camber can be adjusted and the lowering links are installed at all 4 wheels. I had to drive 400 miles to the coast to a shop to do this install and align the car and the first thing I noticed after installing the kit and aligning the car is my WH-Mile improved quite a bit, any where from 280 - 325 WH-Mile . I attached the alignment sheet showing the alignment before the kit was installed and not able to adjust the camber. (A side note, I had the Tesla shop align the car right before I drove to the coast in the hopes this would reduce the wear on my tires) and the bottom of the page shows after the kit was installed and the final alignment. Hope the link works. Please let me know if it doesn't.