Step count of this watch is not that difficult:
add in the rotation field:
240 is the left end of the scale (start).
120 is the right end of the scale (end).
Difference is 120 divided by 20.000 steps.
If you divide by 10.000 steps you will get a smaller scale.
If you want to turn the Hand in the other direction you have to start at 120 and add the steps:
If you have a scale of 10.000 steps and you run higher, you have do duplicat the first step hand with a transparency
and a formula for the rotation from 10k to 20k steps, i.e.: