Auxerrois Ripening Numbers

Based on previous harvest dates, we "feel" that the Auxerrois is about ready to harvest. However, there is no getting around the fact that we need concrete numbers to decide when to harvest. So, yesterday, a representative sampling from the 5 rows of Auxerrois we have was collected and the juice was squeezed from the berries. Judging from the color of the juice, it seemed that the Auxerrois was not quite ready. Here are the numbers that we got from the tests:
Brix      17.5
pH      3.17
TA      7.6 g/L
There are nice days coming up in the week ahead, so we hope that we can accumulate a few more Brix.