well.. I can't speak well English so I just upload links and pictures and a little bit of explanation.
pirsquared(=Eitan) made it first that casting version in here.
And I made here
in last year.
First, You have to make shape pieces like this.
leaf shape.jpg [ 152.92 KiB | Viewed 1376 times ]
leaf shape pieces
corner shape.jpg [ 163.25 KiB | Viewed 1376 times ]
and going to glue the corner shape pieces(left) and make downs one.
Second, Make center pieces.
center piece.jpg [ 139.8 KiB | Viewed 1376 times ]
You have to cut center pieces of skewb for glued leaf shape pieces and turning.
Third, Make corner pieces.
corner pieces.jpg [ 108.85 KiB | Viewed 1376 times ]
glued corner pieces and corner shape pieces.
Fourth, make other corner pieces.
other corner.jpg [ 156.77 KiB | Viewed 1376 times ]
It is need to cut for turning too.
rounding1.jpg [ 141.61 KiB | Viewed 1376 times ]
rounding2.jpg [ 124.22 KiB | Viewed 1376 times ]
stickering1.jpg [ 125.57 KiB | Viewed 1376 times ]
stickering2.jpg [ 156.86 KiB | Viewed 1376 times ]
You can see more picture at here.