About this 3D model

I got a cheap little engraving CNC router which likes to rattle across my work bench as it turns it into a speaker as it vibrates. Had some flexible filament so I made some 'extruded' dampening feet to pop on to the 20x20 extrusion frame. First ones were 3mm on the little circles for the damping and they were stiffer than I expected. So I made a 2mm version as well.