Hi Jon....welcome back to the Forum
Unfortunately, it has gone quiet on here....generally the same on a lot of Forums, social media has taken over and most users have gone there instead 😞
This hopefully will be a short-term dip as there is not a proper search facility in a lot of the social media sites so not good for storing information that can be archived and sourced when needs be, such as with a Forum.
The UK version of this site can be a great source of current information, along with archived information on all Lexus models so would be worth you dropping in to research your RX350https://www.lexusownersclub.co.uk/forum/forum/47-rx-300-rx-350-rx-400h-rx-200t-rx-450h-club/
Best Regards, Trevor