So I am sure all of you have heard about the microwave cone-drive (no, not THAT kind of cone)
https://www.reddit.com/r/Futurology/comments/34cq1b/the_facts_as_we_currently_know_them_about_the/http://science.slashdot.org/story/15/05/01/1929200/new-test-supports-nasas-controversial-em-drivethey should make a asymetrical testing chamber in order to rule out interaction between the chamber and the device,
I assume that it is a Cone in the center of the cylindrical vacuum chamber. What if they put the cone propulsion unit inside of a cone/mangled/crumpled/fat guy sat on it vacuum chamber, that way if they reverse direction and thrust is different, one can begin to assume that is some kind of interaction with the test chamber.
in the current model, if its rotated 180 degrees in the middle of what I assume is a symmetrical vacuum chamber, the interaction would be the same.
If one end of the vacuum chamber has a strong taper or dent etc, then if the effect is caused by chamber/thruster interaction, the positional relationship between the cone thruster and the vacuum chamber is easily revealed. Granted, the effect can be real and some kind of weird version of near field effects and reflections could somehow look like chamber/thruster interactions are responsible for the net force, and not less net force), so an actual space test might still be required, but it is a start.
thoughts?

I kinda wanna go drive down to nasa and attack their vacuum chamber with a sledge hammer for a while

I always knew that watching zoolander many times (mac scene) would get me somewhere in life
or just build a pyramid of beer cans on one side of the test chamber?
and maybe a ceramic/glass vacuum chamber? I'm surprised thats not the first thing they did.......
I wish I could see the cone plugged into a impedance analyzer/antenna analyzer too so we can know about reflections, emissions and thermal loses @ particular frequencies