The Curvy Copter+ is the next step up from the regular Curvy Copter. The Curvy Copter is a so-called jumbling puzzle: a puzzle that behaves like a bandaged cube, but can never be fully "unbandaged". The Curvy Copter plus is the result of applying some unbandaging to the Curvy Copter, creating 24 additional face pieces that can interchange with the corner pieces. The curved cuts create beautiful patterns but for some people it is even a puzzle in itself to figure out what all the possible moves are.
This is an edge turning puzzle.
Difficulty Level 10 (Mind Boggling).