Originally Posted by IMEIV
I have a home made anty vibration foam. The motor is balanced but I think that the very problem is that RVOSD5 due to the small space is in contact with cables and curent sensor.. Therefore it's not isolated.
Did you precisely balance the prop using a magnetic balancer? The prop, of course, is the main source of vibration. There is some vibration caused by turbulence but usually very little. Also, try varying your throttle setting. The vibration at different RPM's can be dramatically different.