This lists differences between the gizmo as built and the current draft of the schematic ​here

• The DATA and CLOCK labels on the schematic are wrong and should be flipped.
• Data going to the 12-bit fine time DAC does not travel through the shift register, but goes directly from data in to both the shift register and the 12-bit DAC
• There is a separate input line that provides the load signal to the 12-bit DAC
• DAC (for fine setting) part number is incorrect. It should be MX7543, not MAX7543.
• (Data sheet: ​http://datasheets.maximintegrated.com/en/ds/MX7543.pdf)