Grado SR80 Bluetooth Conversion

I tried for awhile to find a good quality set of open-ear bluetooth headphones. I was unsuccessful. Since I couldn't buy it, I decided to make it!!

With a set of Grado SR80's, the PCB from a cheap set of Bluetooth headphones, and a headphone pad thing, you can make a great-sounding set of 'phones that work either wired or wirelessly.

Grados: https://www.amazon.com/gp/product/B00L1LXOWS/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
Cheap-o BT Headphones:
https://www.amazon.com/gp/product/B00M9DBBK4/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Headphone Headband Pad:
https://www.amazon.com/gp/product/B00OF722LY/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

The design is three parts:
1. the "can" that holds the drivers from the SR80's (print two of these)
2. the "board" case that holds the PCB + microphone from the cheap BT headphones.
3. the batt case that holds the LiPo battery from the cheap BT headphones.

I'm not affiliated w/ grado, amazon, or the folks that make the c