re: “Stefka Flop” Packing Puzzle.

Hey LBD, when you say. this puzzle has a degree of difficulty rated at 9 out of 10 due to all the internal rotations required for the solution., does that mean after a piece is inserted in the box, it then needs to be rotated? If so, that makes for a very complicated puzzle, or as you said, 9 out of 10.