AMAZING and THX GUYMCCALDIN ! Guy is the guy, a member of this community, who built a 3D printable APM suspension system. As you see on the hover graph above, for my large X8 octo, I get vibrations between -0.03g and +0.03g (to compare with the vibrations I got just using zeal tape +0.15g and -0.15g ).
So this is a factor x5 improvement on vibrations reduction !
Here attached a picture to show the details on how I mounted APM on this suspension system. You can get it at shapeways; I have no personal interest in shapeways, nor in the business of Guy but I think we should encourage people like him who build such perfect tools for our hobby: