Taking apart someone's A10 today, I took better pictures of the mics. Let me know if you need other pics of it.
Update on the cases. We are now on version 5 of the design. At each point in the print process there has been a fail point. Which then needs to be redesigned to ensure it completes. These are just test resins. The final resin will be something robust but able to withstand hotter temps, as stated earlier.