Hi fellows!   I decided to make some maintenance in my 5yo UM2(+) and I take it off the Z-rod for a better cleaning... but I suppose that I miss something when I was reasembling and this Trapezoidal Lead Nut is now out of place 😕 (Check photo). It also gives me an ER06 error... but Z swith looks in place and wires either. The bed is moving freely I suppose that this is the reason.    Should I dissasemble the back cover? Or can I deal with it just trying to hit the screw in pl