It's time for another major redesign. There are lots of things happening, but mainly:

• Power supplies are no longer going to be MC34063 based; too noisy and inefficient.
• Changes to the structure of the schematic.
• Addition of digital and signal grounds to lower noise.
• Possible dual board construction: grounding sensitive 4-layer analog board and 2-layer power / control board.

This is going to be R2!