Mine did not have the bottom peice. I believe this person bought them somewhere else. I will be looking for something similar as the spoke are scratching my shelving.
OK, I'll have to get something as well being I'm going to either place the BHSE on a wood or glass base depending on the distance between the front/back spikes…or I could just sit the spikes in rubber grommets.
Or these:
http://m.ebay.com/itm/4x-Isolation-Speaker-spikes-Spike-Pad-Base-Feet-Pads-Nickel-Black-25-3mm-/291704882014
Those are nice, I saved them to my favorites just incase.