When I finally got to make the first half of the mould from the model, plaster managed to leaked to the other side. In this point I let the leg project to rest for a month and concentrate just in the cup part. The cup I designed to be used also individually and as part of another misson I carved an ear out of plaster for it .
When enogh time passed I was ready to see if the leg model still could be saved. First I managed to separate the model from the mold, then I started carefully to carve the unwanted plaster off the surface. In the end I managed to make a full mould out of a catastrophe.
Now the challenge is to manage to cast a straight coblet, but that is another story.