Cosmos Owners - Sota Cosmos Spikes?

I have a Sota Cosmos IV turntable. It comes with the standard feet and little spikes that can be inserted in the feet.

Have any of you Cosmos owners upgrading the feet/spikes on the Cosmos?
I purchased a 4 in thick maple block with Mapleshade v3 heavyfeet and isoblocks.

Using the platform with the mapleshade system I can detect no audible difference one way or another. I think SOTA has the isolation thing down pretty damn good.

It looks neat but I think I am going to move the block to the cd player to play around a little and see if I can gain some improvement.