Hi guys, I am back...! Sorry Rubberlips for answering PM late.
I didn't know Eco Disc. It seems eco friendly but really less user friendly...
I remember when 5 or 6 years ago we put a Shakira Cactus protected CD into the iMac (the white one, the Star Treky ball with a LCD on top

).
It was a nightmare. No way of ejecting this disc. We tried every soft-operation possible. Even contacted the Apple help and entered in bios-like menus guided by them. No way. The Pioneer Superdrive in it had no longer the eject button for building space reason.
We took the screwdriver and completely unmounted it. In the end the Pioneer drive surrendered to our good ways...
Good luck, Rubberlips.
P.