Another beautiful 3x3x3 modification built by Frank Schwartz.
The common 3x3x3 shape was slightly reduced to form the shape of an X.
This also required the center pieces to be placed a little bit deeper, which caused more effort as obvious, as Frank commented. So he planned not to build further puzzles of this puzzle type.
Size: edge length 5.5cm
Diameter at edge pieces: 4.7cm