Editing Professor's Cube (section)

==Stability and durability==
[[File:5×5×5 misaligned.jpg|thumb|This type of center misalignment occurred during a turn and can only occur with the original design.]]
The original Professor's Cube is inherently more delicate than the 3×3×3 Rubik's Cube because of the much greater number of moving parts and pieces. Because of its fragile design, the Rubik's brand Professor's Cube is not suitable for [[Speedcubing]]. Applying excessive force to the cube when twisting it may result in broken pieces.<ref>[http://www.rubiks.com/Shop/Products/Rubiks%205x5%20Cube%20Hex%20Packaging.aspx Rubik's 5×5×5 Cube notice section]</ref>  Both the Eastsheen 5×5×5 and the V-Cube 5 are designed with different mechanisms in an attempt to remedy the fragility of the original design.