Well, I do have a drawer full of Vibrapod Isolators I could try in lieu of the silicone gel pads. Looking at those two options from an isolation standpoint, the gel pads look like they have far more damping mass to absorb vibrations, though.
07-31-11: Inna
You could experiment with something different under your maple platform, I mean cones or perhaps Mapleshade isoblocks. I certainly would.
I first picked up the gel pad tip from a DJ who used them under his Technics SL1200s in dance clubs. He said it made a huge difference in how far he could turn up the volume (and bass) without getting feedback. They're very effective at that.