Hello all, wondering if any of you has any experience updating the firmware of your cooper using ISTA - been wondering if it's worth it after hearing that newer firmware can help with the automatic transmission slushiness. I figured while I am going through all the effort may as well update all the modules. How easy was it? I already have ISTA+ so not much is needed on that end, does anyone know of a good automotive power supply to aid during the flashing process? Is it even worth it to attempt myself?