Asmund, my PSP is rubber mounted so it could shake if it wanted to but it is as smooth as silk. Anybody that tells you that a Saito shakes doesn't have it set correctly, or they have it on one of those planes with a non existent fuselage. My 2.20 shakes a little between 3,500 and about 4,500 but it is probably at the upper limit for the rubber bushings.