Good for the beginning!
A better and dynamic method would be to measure and to sum up the absoulte change in stroke (position 2 - position 1) at every simulation step. With this method you will get (nearly) absolutely accurate values.
yep your right... but i'm only 10 and... I still don't know how to do that.
well... I still don"t know the concept of a k-probe or something like that...
well according to my other scenes... I'm like intermediate with no knowledge about K-probes.