Ever wondered if your d20 was balanced correctly? Concerned that you have a die that always rolls low? A guy called Daniel Fisher has the solution for you - a trick that golfers apparently use to test their golf balls! All you need is your d20, and a glass of salt water (room temperature water with a load of salt in it - as much as needed to make the die float).
[video=youtube;VI3N4Qg-JZM]https://www.youtube.com/watch?v=VI3N4Qg-JZM[/video]
[video=youtube;VI3N4Qg-JZM]https://www.youtube.com/watch?v=VI3N4Qg-JZM[/video]