How has that battery pack held up? I'm looking into doing the same thing for mine.

So after testing the boards with the hub tomorrow and if that works I will have the boards for sale in less than 2 weeks! Now you can remove the teensy and usbhub and amplifier out of the equation plus the hole template and PWM filter. This is fantastic! Do you have thoughts on the price for these ...

Was there ever an update of the finished product? Thinking about going the fiber route for mine as well.