The search for complex geometries secretly hidden in stone, goes on, already 2 trefoils were connected, and also 2 Split Tori. Now the question came, “Is it possible to connect a Trefoil with a Split Torus. To investigate this possibility a preliminary study had to be done to see if it was possible to make a split torus in the diagonal of a stone. In order to be able to connect a Trefoil to a Split torus, the stone would be more massive, so the orientation of the Split Torus would be different. This was difficult, because several parts of the splitting could not be reached from the outside. So new instruments had to be made and this one served as a sort training tool. The result of all the efforts is here. When Carlo Sequin, who is a specialist of 3 D engineering saw this one first he said to me this is impossible, and indeed it seems to be, but with some tricks I managed, knowing now that the other projects would be possible too.