This makes no sense at all. The camera is not "defective" in any way. The alleged "defect" doesn't affect anyone except those who photograph their lens caps.
Have you found any instance in which it affects a photograph? Have you, really?
Canon is being generous to even offer to inspect cameras. This is a huge tempest in a teapot, and nothing that affects any real photographer or photograph.
I am not
sending the 5D3 back. I am not sending it anywhere, not even to be inspected. I've been using it and finding it to be the best, most capable camera I've ever used.
Every electronic product on the market likely has some comparable nonsensical "defect". Every machine in your home and garage probably has some comparable nonsensical "defect".
This notion of perfection is reaching a new level of craziness. Canon, STOP selling cameras to people who find nonsensical "defects"! The rest of us will use the cameras very well, as they were intended.
I AM packing them up today and sending them back for full refund.