Thanks, that’s OK, I’ll handle the adding of bits 
Some more stuff done this weekend, as illustrated in this clip:
Lots of big Blueprints. Setup was fairly smooth, although it would have been easier to do if I didn’t try to watch football at the same time… but there you go.
The key thing for this to work was to let the PlayerController subclass take (and consume) all the user input and then carefully pass it on to the correct vehicle instances rather than having them registered as input receivers themselves. Worked a treat.
I’ll have to get my UX guy (that’s me on thursdays) to figure out a way to make this as non-befuddling as possible at some point.