Re the vehicles of the Clans in Quicksilver. Of all the Clans only the Horses really ever showed any interest in vehicles, and I think for the Quicksilver retrofits, I think the other Clans might well defer to their experience with them.
One thing I would press for though, anything with an ICE should have the option of having it replaced with a fuel cell engine. In theory its not a massive change, you're not changing the drive train or running gear, just the powerplant with the batteries going where the fuel tanks were. And considering that the Clans seemingly produce vehicles as and when needed, they could be altered in construction and most of the work could probably be done in local facilities.
Also this would only apply to a small number of vehicles and would have a minimal impact on any supply chain.