I am not likely to "manufacture" anything for this. My plan is just to get my own setup going (after Christmas), and share whatever it takes to do so.

The first rev will be the external BT dev board, connecting to the tuner connector on the empeg, most likely with I2S also hooked up through the tuner connector. The empeg CPU will do all of the control etc..

If I ever do a second rev, it will be to replace the large/expensive BT dev board with just the BT module instead, and that is tiny enough to be mounted inside the empeg (probably in a drive bay). I had been shying away from doing this, because of the difficulty (for me) of keeping clean audio paths. But with pure digital audio interconnects (I2S), that all becomes a non-factor. Thanks again, Tony!