Yeah, it survives a power cycle. Just plug one in at a time and run hfa-name, then after that you can use left, right and middle. It's a better way of doing it, as if you plug in the devices in a different order and the USB numbers get swapped, it still sets the properly.
That sounds easy enough. One by one and then still use:
--hfa-options left:420@780,midleft:437@770,etc:550@780,etc2:650@820
I'll give it a test run here shortly.
PS: Shot you some positive trust for the boards. I thought I did it a long time ago, but apparently I didn't. Thanks for the boards and help.