Original sentence: Supposed "Electrostatic anti-gravity"-machines have been tested in a vacuum, and either insufficient force or no force at all was produced by the test device able to levitate it, at the undeclared vacuum level that the experiment was performed
Edited sentence: In the Mythbusters experiments in vacuum, the lowest unit of force detectable was the device ability to lift its own weight, which was not observed.Supposed "Electrostatic anti-gravity"-machines have been tested in vacuum, even in an episode of the Mythbusters, and either insufficient force or no force at all was produced by the test device able to levitate it, at the undeclared vacuum level that the experiment was performed