[NO MARKUP] This D20 Di(c)e was designed to have a perfect centre of gravity - right in the centre of the icosahedral shape. Unlike other balanced dice, this is done without making any of the pips (holes) different from any other - They are all identical. The centre of gravity has not been tweaked by morphing the geometry either (e.g. changing the thicknesses at one side). Instead, the centre of gravity is perfectly balanced due to the careful positioning of the pips. Each pip is linked to at least three other pips on the die, and each linked set is positioned such that their symmetry results in no net change in the die's centre of gravity. Please note that the pips have not been moved based on trial and error to find a result which has a centre of gravity almost exactly in the centre of the die. Rather, their positions have been calculated mathematically, using symmetry to prevent the pips from affecting the die's centre of gravity, and so the centre of gravity here is EXACTLY centred in the die. Note that once the shape has been 3D printed, due to tolerances in the manufacturing process, the centre of gravity will be ever-so-slightly different than the 3D model. Having tried to find a similar concept on the internet, I believe this to be a world-first. That is, a die using only the symmetry of its pips' positions to maintain the original shape's centre of gravity. Due to the design, it also has a sort of 'numerical CoG', that is, the numbers are well distributed around the die to achieve fair rolls - it's the very opposite of having all of the large numbers on one side of the dice. The design has been developed to roll with ease, and I was personally surprised by how much it does roll before stopping. The die is very strong in steel, and there should be no risk of damage when being used for its intended purpose. This was a personal project of mine a couple of years back, and I thought it would be a waste to keep it to myself as I do think that it is quite a special concept. If you have any feedback whatsoever, I would be really interested to hear. You can message me, Jonathan Fowler, on firstname.lastname@example.org.