If it were me, I'd follow Mapleshade's recommendations. I'd also try removing the cups from the VPI cones and let the points have contact on the platform. Of course as you know, that's really what the platform is for - to act as a "sink" for the vibration to drain into. I encourage you to experiment both ways, but I expect the cups would only act as a hard, flat surface against another hard, flat surface and just introduce the possibility for more vibration to occur. That particular kind of vibration BTW (between 2 hard surfaces), IME tends to add a recognizable brittleness or harshness to the upper mids. Sometimes using hard points that I've tried have had that same kind of effect, especially if the component on top of them weighs too little. It may help to add mass, but that may be a little problematic with a TT, of course. The biggest potential problem I see with your TT depends on the number of cones you have. If you have 4 cones, this is the most stable arrangement, but you may need to insure that all 4 are in as close to an equal amount of contact with the platform as is practical. Due to the fact that your platform may not be perfectly flat, then any time you need to lift the TT off of the platform, you then may need to recheck this, or you may hear a change...or not, it may depend. Of course, it helps that it's soft wood we're talking about and, effectively the more the points can dig in, the better...less chance for that upper-mid problem to develop. Of course, if you had 3 cones, this problem would be moot, although it would maybe be an awkward arrangement if your TT got bumped. Hope this helps.
