This is a remix from the "iPad Air Sound Deflector", since my iPad ru without a case, and it's the iPad Air 2 (thinner) I tried my best to create this in Fusion 360. The part is exactly 6.1mm thick on the openings, so it is really flush with the tablet, if you are having trouble with the thickness try to reduce the Flow in Cura or your slicer of choice. Feel free to leave a comment and suggestion since this is my fit project in Fusion 360.