An insanely amazing solo on a double-cuatro

This is a spectacular solo made by a Cuatro Soloist called Antonio León.  He’s just doing stuff on the cuatro that you wouldn’t believe it’s possible.  And it’s even more mind blowing when he realizes his solo on this double cuatro:

That’s an special cuatro made by an Experimental Luthier called Alfonso Sandoval, an architect from a famous university on Venezuela.