The first 4x4x6 cuboid was made in 2004 by Tony Fisher, based on an idea of Geert Hellings to modify a 4x4x4 to have two extra layers. Joshua has made a very generous offer and paid me to design a 3D printable 4x4x6, and make it open source.
Joshua's initial proposal was to make the design based on the Rubik's 4x4x4, but I suggested to use a completely new mechanism since it would most likely result in a much higher quality while not raising the cost very much. This new mechanism works really well and the result puzzle is absolutely perfect. It turns smoothly and even cuts corners some. In the video it makes a quite loud squeaking noise but it has been getting better.
This puzzle can be bought as a DIY kit from my puzzle shop. A DIY kit contains just the 3D printed pieces needed to build the puzzle, you will need to supply your own stickers and screws, springs and washers (usually M3 size). For an additional fee, I can sell you an assembled and stickered puzzle. Contact me at email@example.com for this service.Click here to buy your own 4x4x6 Cuboid puzzle kit from my shopBACK