Как и обещал
               

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и еще немного:
           

От производителя, по поводу стержней связывающих врехнюю и нижнюю плоскость:
The Threaded Centre Rod
SKYLAN's unique design employs a threaded rod that runs down the centre of the stand and mates with top and bottom plates. The rod serves more than the obvious purpose of holding the stand together. It has another purpose as a transmission line. This transmission line takes vibrations from the top plate down to the bottom plate. The mass load (usually sand) surrounds the rod and absorbs this energy, damping vibration down its length.

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(29-10-2015 22:39)nikko писал(а):  Про "лунный грунт" (материал засыпки) також интресно...

Не мои слова, производителя:
The medium used most commonly is sand. Hygienic Play Sand is available at most home and garden stores. Intended for filling children's sandboxes, it is inexpensive and readily available.
Clay is an alternative medium. Montmorillonite and other similar materials are composed of hardened clay balls and sold as kitty litter.

И никакого лунного грунта