Hi gianakop ,
we share the same problem.
I received my Leapfrog from my employer who was more than happy when somebody carried it out of the office.

-here we are.20200111_100623.jpg
I had problems with y stepper noise, but now all steppers are quiet, thanks to advise from this forum.
I also improved the filament cooling by aluminum fairings. I changed the z probe to ordinary microswitch because of my limited skills in electronics. Maybe You have tried the original one?
Now I´m working with the second extruder and dual extruding and thermistors.