Tumbling toward the finish on Sensor Watch. I couldn’t order the last parts for this manufacturing run until I tested the new crystal and load capacitors. This time I’m using a GPS-disciplined oven controlled crystal oscillator, a frequency counter, and a n 8 Hz output from the real-time clock. Ideally I would like for this number to read 8.000000000 Hz precisely — but being off by 2.4 parts per million isn’t exactly a *bad* start. Trying again…