Over the years many people here have inquired about the earcap measurements and, for reasons completely unknown to myself, nobody is willing to just post them.
So here's something someone else had done a while back but I couldn't find anymore. Here's a simple drawing I did. If you print this at "actual size", and landscaped, you will have pretty accurate ear caps. I used the known widths (which I believe are correct) from my old DP deluxe from years ago and used long range photographs to spirit out the rest of the dimensions.
I did a test print on an HP B209M and it came out with almost zero distortion. I will post another with given dimensions added in. If anybody notices any discrepancies from the MR helmet measurements please feel free to elaborate!