Odds of getting G/E Proces in L58 and 2-Star L60 recipes

[Silverbane]

I tracked the occurance of Good/Excellent conditions on a Level 58 35 durability recipe (Adamantite Nugget) and a L60 2-Star 70 durability recipe (Adamantite Ingots).
I then did an experiment on a 2-Star Level 60 70 durability craft.

For Adamantite Nuggets, out of 665 applicable steps, I counted 94 Good or Excellent conditions.
For Adamantite Ingots, out of 336 applicable steps, I counted 29 Good or Excellent conditions. See update below.
Applicable steps excludes the last step.

The chance of a Good/EXC during a step of a L58 d35 recipe seems to be about 1 in 7 (14.14%).
The chance of a Good/EXC during a step of a L60 2-Star d70 recipe seems to be about 1 in 11.5 (8.63%). See update below.

Based on the sample sizes, the 93% (2 standard deviation) confidence interval is:

For L58: 14.14% +/- 2.45%
For L60 2-Star: 8.63% +/- 2.78%

I will try to get more samples to narrow the confidence interval. Feel free to submit your experiences.

Update: We did some more L60 2-Star, with 404 opportunities for G/E condition, and had 38 occur.
The percentage of occurrence in mats was about 9.43%, and the percentage in finished tools was 9.34%

Adding these samples to the previous once, we get:
The chance of a Good/EXC during a step of a L60 2-Star d70 recipe seems to be about 1 in 11.0 (9.05%).

Confidence Interval for L60 2-Star proc odds: 9.05% +/- 2.05%