Drip Electronics Dual 176 PCBs

Has anyone had experience or success with building a 176 compressor clone using the PCBs from Drip Electronics? I got well into the project but stalled when I needed some questions answered by Drip and Gregory there went silent. A beautiful design and nifty PCBs, but some uncertainty about some of the capacitor values and circuit alternatives on the PCBs has me stymied.

-Jon