So many oddities with mobu!! Not sure if I’m setting up the scene wrong or something but Ive just characterised my character, loaded onto it the animations from my other slightly differently proportioned character and they come out seemingly fine. But now I have introduced a weird phenomenon of when I click to move or rotate the right wrist effector (in any direction) it snaps back a few units, and keeps moving backwards every time I click it!!
Anyway, you work around these strange happenings but you do wonder is anyone else having similar issues! 
(just noticed if I click to move any effector like left foot eff, in full body mode, the right wrist will start moving back of its own accord, in body part it doesn’t move, haha)