public service announcement:
after giving my new mechanical a month's worth of full winds, I used the Watch Accuracy Meter app to regulate it. with the app I was able to see that my movement was fastest in 6 and 9 up position and slowest in 3 up, and that the delta or range between all positions was 26 seconds.

however, when I compared with observing the actual SPD over the course of a full day, my regulation I did with the app came out ~20 seconds faster than what it gave me. although, the delta was 23 seconds. so, the app's delta reading was basically accurate with the observed.

with this knowledge, I used the app to give me a "wrong" reading that came out to what I wanted IRL.