1 hr. on the rear seat bottom.

The manual doesn't indicate the part numbers of the channels going in the seat bottom, but it was pretty easy to figure out (CHL-001, 002, 003).

Coming together.  The side plate holes are 3.2mm, but the holes in the seat side channels are 4mm, so I'll need to ream them to size.

Hmmm....  The pitch of the piano hinge holes does not match the pitch in the ANG part...  Time to ask the factory.