This is my first Instructable, and my first entry into a competition! If you like this instructable, please vote for it in the Instructables Puzzle Competition, thanks!
I designed this puzzle a few months ago in Solidworks. While it was my own independent idea and design, I later learned that this puzzle has been made before, under the name of the "Rhombiminx", so I'll give a little bit of history about it before I go into how to make one.
From the TwistyPuzzles Museum:
"The Rhombiminx was originally built in 2003 by Laurent Blanc from a modified giant Rubik's 2x2x2. In 2008, it was independently designed and built by Garrett Ong using a modified Eastsheen 4x4x4 mechanism and cast tips parts made from handbuilt masters. Later on a second version was built using FDM printed master parts for a more precise build. In April 2009 a mini version was built using a mini Eastsheen 2x2x2 core and molding/casting. From the solving point of view the puzzles behaves like a 4x4x4 which contains just face cubies. The version from 2008 sold for 205 USD."
As far as I know, this is the first Rhombiminx that (besides the mini 2x2 core) has been completely FDM 3D-Printed. In this Instructable, you will learn how to prepare, print, assemble, and sticker a rhombiminx of your very own!