Another update: I've worked out the seat folding procedure. While it'd be great to be able to do it with one hand, two seem to work best.
- Pull the long strap to drop the headrest and fold the seat forwards.
- Put the lower floor cover aside for a moment.
- Pull the big handle on the back of the seat up and a little back with the left hand while lifting upwards a bit. With the right hand, grab the base of the seat or the crossbeam just below it and pull that back at the same time. Seems to fold right up when you do that. Again, a clear image of someone actually doing it would improve the documentation.
