You're not going to believe this.
2 x IKEA APTITLIG butcher's blocks in bamboo
10 x 7/16 inch Diameter Grade 100 Hardened Chrome Steel Ball Bearings
Did this for my turntable to isolate it; http://www.theaudiobeat.com/blog/ikea_aptitlig_platform.htm
Though my main problem now is the amount of 'air turbulence' my speakers produce, due to the closeness of my speakers to my turntable. The drive unit cones move really quickly and produce this 'booooooooooooooom' noise that pushes the tone arm across the record.
Doesn't happen with CD's.
Laughing at myself here, so you don't have to...