DIY Impact Noise Isolating 'Tennis Ball' Drum Platform

How to make a neighbour friendly platform for electric drum kit that has impact noise isolating elements. This is my 1000 x 700 mm version of the famous tennis ball drum riser, made for Thomann&Millenium MPS-200 drum kit. Parts from the floor upwards: 8 rubber buttons as feet 1000 x 700 x 19 mm MDF board 8 tennis balls Another MDF board Impact sound isolation foamed plastic for laminate floors 10 mm rubber gym mat Another layer of floor isolation Runner carpet Licensed under Creative Commons: By Attribution 3.0