I just had mine done at the Rockville SC. I also called around and nobody else wanted to do it - one performance shop called Hunter (manufacturer of alignment systems) and was told that it's a very complicated process and even they recommended just letting Tesla do it. I didn't receive the customary printout of pre/post values like every other alignment I've ever gotten, but I was happy with the results. My front caster was too high and caused rubbing with my wider tires. The car feels significantly better now and the caster is fixed. $211 with tax.