I would have loved that mount a few weeks ago... had the perfect job for it. But the RED 300mm with a doubler served well.
That 600mm is my favourite big lens, I have one sitting next to my desk staring the the EPIC all day. :)
Nice work Vincent as usual.
Tell us the secret of getting all this prototype gear to test, You've got photos of somebody hi up in RED with a Goat. :)