This is interesting.... while hunting for a case for air travel with my Brompton, I called JV Bikes in Vancouver as I previously alluded to. They nixed the idea of using a Tern Airporter Mini to pack a Brompton. They actually tried the day before and said it just didn't work because of the internal padding. Mind you, I think they were talking about the latest version of the Tern case. Another dealer commented that the older Dahon equivalent had less padding.
If anybody has a Brompton and a Tern Airporter Mini, it would be great to hear some comments and see a photo.