Hi! I bought a 4 MK 3638 motors second hand(), the guy said they were fine blablabla...the vibration in them is 10 times biger that the other motors I have.I ve been through balancing proces with not much succes,none at all actually, vertical axis z is very high. At this point my question is, has anybody tried this repair kit with succesfull results? https://www.mikrocontroller.com/ind...id=649&zenid=f5d4cb4a5a25b185ac51b5fac136782f Thanks!!