Two-tier transformable sofa - GIF

Two-tier transformable sofa.

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Previously:

Delivering a sofa to an apartment - GIF
Moving a sofa on a bicycle - GIF
Powered extending sofa - GIF

That's pretty cool but I bet it is heavy.

Three men and a boy couldn't get that up the stairs...

Clearly a great design for tight spaces. Was this ever made or as previously stated was it just too heavy to be practical