Thank you @PastyPilgrim for writing an excellent How-to! The process was as simple as it gets. Timeline:
Applied 10-6
Ack received 10-10
Approved 10-28
Check received 11-21
For me:
Left/right buttons work (inflating balloon in lower back region).
Up/down appears to do nothing. It would be helpful to know what it's supposed to do.
Can someone whose 4-button action works explain what the up/down does?