This is so nice of you, taking time to create a 3D model.
When DENON is unable to fix their own wrong-doings.
The printed items needed some sanding to make the screw-covers fit. And they can pop out of the earpieces, so the "studs need to be slightly longer?
Also, you made "the top of them" flat, whereas the original are curved, so yours are a bit hard getting in place. (where they're fitted to the metal rod)
There is one other model here on thingiverse that seems to skip the screwcover completely. (http://www.thingiverse.com/thing:732057)
I might try that one later, but yours works just fine!
(Printed on a makerbot replicator 2)