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The long awaited bigger brother of the 2x3x4. Unlike all the previous 3x4x5s, this isn't a cubie chaos out of 2 siamese cubes but a fully finctional 3x4x5 cuboid.
There are only three cuboids with totally different dimensions each between 2 and 5. Two are the 2x3x4 and 2x3x5. This is the missing one. The community had to wait until end of 2009 to see a working example. Like many cuboids it can change its shape.
The first sample was designed in CAD by Tom van der Zanden. One year later Traiphum Prungtaengkit built on by hand from a 3x3x4 though sometimes the internal blocking happened because of the internal edges split into 2 pieces instead of 3. However there was an easier way to make a fully functional 3x4x5 out of an Eastsheen 5x5x5 and 18mm cubies. This method was later implemented by Rouven Töricht but using a V-cube 5 and 22,5mm cubies from 4 2x2x4 Tower cuboids. Some of the cubies were 19,5 x 22,5mm. The mechanism is essentially a bandaged 6x6x6 with 2 layers cut into circles and with cubies glued on, each cubies has an edge length of 2 6x6x6 cubies' edge length.
Beginning in 2012 MF8 started mass-producing another variant of this puzzle. This mass produced version came with black, white and transparent body. Even today making a handmade 3x4x5 out of a 5x5x5 might be a better option since the mass produced cuboid has a tendency to pop and the pieces do not have any stabilisators(hooks, anchors, torpedoes).
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