I agree. I think it would be less expensive (but not cheap) to build definitive test equipment on Earth than in space. Space operations also might cause new ty

I agree. I think it would be less expensive (but not cheap) to build definitive test equipment on Earth than in space. Space operations also might cause new types of artifacts. One such might be forces from induced currents due to spacecraft motion relative to the Earth's magnetic field. I think it's just expensive to do a really definitive physical demo in this domain, given that the effect (if there is one) is so small and sources of artifacts so numerous.