Quota

Question, how do you arrange for the two xl engines to rotate in the opposite direction?

Pardon my stupidity, but What does this do? And is There a partskist? Anyway i Can obtain the these modificaties? I have Another XL motor lying around which i would like to put to good use

Hi There, My nickname is Quota and i am new here. Last year i bought my first Lego technicus set (second hand) and recently i obtained the 42070 set. I hope to find some improvements here. I am thinking about a few things to chance to it myself, yet i lack parts tot improve and modify the set.