I thought I was OCD, but my sis in law has gone that step further with her D750 purchase this weekend.
1. Go to
park cameras and pick up D750
2. Get half way home and see some pretty scences
3. Sis in law gets out new D750 and goes to put lens on
4. Said D750 has slight rattle when its tilted back and forth
5. Travel back to shop
6. Try model on display - makes same noise
7. Go to staff memeber - who says its the orientation sensor
8. Do not believe staff member and get staff member to get another D750 from stock room - makes same noise
9. Leave with original D750
10. Get home - check mine - does same thing
11. Moan at OCD family member
12. Do not show face in Park Camers for long time