hallo amram
i have the same problem as you ,, dont like the vibrations/noise at idel,, an mid range. the fuse banging 7cm side/ side
it has crash my gears on my bls 551 and 451 and sloopy all over my new plane []
i have pull it out of ,my inspec and put back YS mount ,
i read its this is the best lr 85, ! but 200$ in my trash, mayby its a ´failure, with the mount??? so i hope i could get a new ..
i m not realy happy have it performs,, Ohh forgot,, its have a better sound only 89db at 3m as my Ys mount..
and fore ops.. the nose ring is not lose, and prop.. spinder is ballance..
not the best video but...
http://www.youtube.com/watch?v=Mm3wPzdG8BM