I think I see what you are trying to do.
With my Patek 3919, there was no hacking.
One option is to put slight reverse pressure on the crown against the opposite direction you would wind it, not so much that the hands move backwards but enough that the second hand slows and then stops.
The other option I would always use is to send someone an instant message the moment the second hand struck a certain time. Then, the next day, do the same thing and compare the two times your IM program shows the messages were sent to see the daily deviation. (Keep in mind you will need to sync your computer time as well.)
Hope this helps!