I have had this maple isolation platform laying around for quite some time now and had been meaning to get around to cutting it in half and making it wider to fit my turntable, and well I finally did.
I installed it under my turntable and the results are simply amazing.
To say there is an improvement would be a huge understatement.
I am frankly surprised at just how much better my vinyl sounds now, I had no idea it could possibly sound this much better.
Now to clarify it already sounded very very good, at least I thought it did.
So I guess I have learned how using the right isolation in the right application can be hugely beneficial.
When the turntable was on the entertainment stand I would knock on the stand and hear it very loudly through the speakers when stylus was engaged with record and now there is no feedback at all doing the same thing.
The soundstage the clarity the separation the detail the bass all greatly improved and even the highs seem clearer with less of an edge.
The platform was originally black but I decided to sand it down and stain and poly it.
I like how the center pieces of walnut stand out.
I just used some polyurethane self adhesive feet from Home Depot.

Pic 3

My take on a TT without isolation is like a room without treatment!  

That was my nod to Lonley Raven.  But kidding aside, why TT isolation is so important is pretty easy to understand once we understand that the whole function of a TT system is to transpose ultra fine vibration into sound.  Natually, any outside interference would distort the reproduced sound.  I believe that on the other end, speaker isolation is equally important.  (I'm repeating this for those who still haven't gone the isolation route.)

If there is any impact on sound from tapping on anything other than the TT itself, you can be sure you're not getting accurate sound repoduction at a fundamental level.  It would be nice to hear playback from a TT suspended in a vacuum!

I'd recommend Herbie's Audio Lab Grungebuster dots. Four of the l.5" ones, one under each corner. . . probably cost you less than 20 bucks total and will do the job. Other components I've tried under the platform colored the sound, these don't. . . .

Steve Herbelin is a truly dedicated businessman and he mails out immediately. . . you'll hardly ever get anything delivered faster in audio.

http://herbiesaudiolab.net/gb.htm

I used to use the Iso-blocks, came with the platform. They seemed to negate the benefits of the platform to me. I moved to the Grungebuster dots at Steve Herbelin's suggestion and it was a good one. I've tried Tenderfeet under the platform. . . made the sound too warm for my system.

Thanks guys.
Will probably go with your suggestion Lon.
Check my new Topic Lon, Freekin out.