Okay, on to plan X?
I think I’m going to mount the iQaudio DAC+ directly to the pi:
With the DAC mounted on the pi, my power issue I think becomes moot. The iQaudio DAC has a separate header, similar to the OSPi. If I understand the GPIO pinout correctly, can I just jumper/ribbon cable between pins 3, 5, 7, 8, 9, 10, 11, 13,15 on each header (i.e, DAC header <—–> OSPi header)?
The only pins that the DAC AND OSPi both use are 3 & 5 (as well as power pins), which can both be shared, right?