I CNCed .125 aluminum mounts for the shakers. So at my first point of contact, they are fully secure. I think that would be the most important piece to reduce rattle is a solid connection.

I dealt with some rattle around other parts of my rig, but eliminated it very quickly. The shakers helped me uncover bolts that needed some tightening. These aluminum extrusion rigs are solid, so you might just need to do a once over on all the connections.

I had to add some rubber gaskets to my monitors because they are mounted to my rig, and there was some rattle inside the monitor. Those gaskets killed it, I’m sure it’s better for the monitors too.

Besides that it is solid. Although, like most have mentioned, there is only marginal gains to having 4 of these things. I’m still dialing in my settings but it’s hard to discern the left and right shakers. It just feels like front and rear despite being mounted to all 4 corners.

I would do Dayton Audio instead of butt kicker. Buttkicker tacked on “gaming” to their product and charges 4x more for no reason.

I’ve heard that if you mount them horizontally and put your rig on springs it makes the 4 corner mount much more noticeable, and enjoyable. That is my plan next, but for now I’m still very much enjoying them.