Evil Twin 3x3

The Evil Twin is a puzzle that appears to be a 3x3 Rubik's Cube, but is actually made by fusing two 2x2 puzzles at a corner, and then adding extra cubies to give the appearance of a 3x3. The first puzzle of this type was made by Mike Grimsley in 2005. The example here was made by fusing and extending 24mm 2x2s with 3D-printed extensions. I designed these extensions myself (in 2018), and invite you to print them yourself and make your own copy. This is a really fun and interesting puzzle, and I h