Have a look at SGR Audio racks, same thing, been around since about 2010 or maybe 2011 I'm guessing, the only difference is the isolation board/biscuit..... I'm guessing the isolation propriety pucks are "sorbothane"... The SGR racks that I owned back in the day were the best racks I have owned apart from what I have now, but, we are talking about 400kgs of very high density natural hard wood in Aus!