Being a Model S owner and Model X reservation holder got me thinking....Tesla should allow dual Model S/X/3 owners to trade-in the included new UMC on their second vehicle for an HPWC. My wife wants to keep the UMC in her Model X. I don't carry the UMC with me unless I'm going out of range. So, I wonder if Tesla would allow me to trade-in the UMC for an HPWC (up-charge welcome) and then have that permanently mounted in the garage with our one UMC in the X and I can borrow the UMC if I ever need it. No need for two UMCs really. Thoughts? I guess I can buy an HPWC and sell the brand new UMC......my cost would only be the difference.