Michael...I have two Neuance shelves, and I like them very much. Surprisingly, I found that the one under my amp (Blue Circle BC202 hybrid amp, 70lbs) is more effective than the one under my transport (EA Sony S7700). I suspect this is because I have the amp on the floor, whereas the transport sits on a TAOC rack...the TAOC has some pretty serious shelves built in (multi-layed MDF with an iron-powder core), so the Neuance there is kind of redundant.
John...not sure if I'm selling them (if I do, it will only be the one I use for my transport, per my comments above). If I do, it won't be much different than what I paid for it since it is fairly new...your benefit will be that you won't have to wait the 6-7 weeks it takes for Neuance to build it. But I'm happy to loan it to you if you want to try it first. Do you happen to know the dimensions/footprint of the Arcam?