The marbled beast is the prototype I wrote about, with sloppy marbling (didn't stir it enough, didn't dip it in right), but still you can see the effect, it fools many into thinking it is made of stone. The two-tier design was meant to address that worrisome rumble aspect which I later found out wasn't an issue. I removed the motor entirely from the top-plate and mounted it on the large bottom plinth, which is made of a sandwich of 1 1/2" chipboard, drywall (for plaster's resonance-killing properties when sandwiched: an experiment) and Baltic Birch-ply. This is very difficult to do, as the motor must be in precisely the same orientation without a millimetre's deviation, or there will be serious wow. The motor rests on the original Lenco springs inside the large non-resonant box, for which a space sufficient for the motor was cut out. I later found that all this trouble was not necessary, as I could not hear any more noise (which is none) leaving the Lenco as is in a single solid plinth. Much simpler, much easier. The top plate is mounted on a simple piece of Baltic Finnish birch-ply, to reduce total mass (mass being reserved to kill motor resonances/energy only) so as not to store energy. That was the design brief for my prototype: a mix of the advantages of high-mass design with the advantages of low-mass design. The top tier is further isolated from the bottom tier by lossy silicone putty, held in place by nuts and washers. Rudimentary, but effective.  It may in fact be superior to a single-plinth design, but all Lencos I have tested in all systems were so awesome that no one ever worried about it.

Looking at the second photo, one can see the "open concept" of the architecture of the Lenco plinth, which allows at least some of the motor vibration to escape into the air.  In my simpler single plinth design, the large cut-out area for the motor accomplishes the same thing.  Note that instead of TipToes, I use acorn-headed bolts for feet, which have a large and firm contact area with the plinth, but a small contact area with the surface on which they rest, same as TipToes for a fraction of the cost.  The bolt "towers" make the table fully adjustable, and the second "storey" also fully adjustable via the bolts separating the top tier from the bottom.  I have been using this 'table for more than 10 years without having to replace or adjust a thing.

Here the amount of space around the motor can be clearly seen on a single-plinth design, along with the acorn-headed bolts/TipToes.  The air also allows the Mighty Lenco Motor to run cool, and prevent any possible warpage of the idler wheel as well as overheating from the motor.  A sort of inverted open-architecture plinth, the box being a single non-resonant mass of MDF and Corian, cut to accommodate the motor and the tonearm and bolts, and so not in fact a box but a slab.  One can see one of the four bolts holding the Lenco to the plinth screw directly into the top-plate where the suspension springs were originally attached.  Easy and effective.