Zoom H2n Isolator

I was looking for a stereo recorder. I wound up buying a Zoom H2n recorder. My decision was based a lot on this recording of a Tool concert.
https://www.youtube.com/watch?v=AWWTtdsbmG0
This guy used a cup holder and got phenomenal results! Now imagine using your 3D printer and some rubberbands to improve on the cup holder idea!!

This thing is not finished. The holes for the rubberbands aren't quite wide enough and inserting the rubberbands is tough. I am going to widen the openings up