Hmm, but my margin per trade was 50(default avg of Z-systems) not 3000?
3000 was my capital.
So should I increase my margin by 3075/3000 = 1.025
Old margin: 50 -> new margin: 51.25 ?

(Maybe you could add an example scenario for this in the manual too. You have a scenario for reinvesting and one for withdrawing, but none for both)