Something else worth trying, an experiment that shouldn't be too expensive to assemble would be to spin the apparatus while it is set in it's horizontal position. IOW, turn the apparatus into a spinning centrifuge. Make sure it's carefully counter balanced, then spin up the RPMs to something equivalent to 1 g. My suspicion is that as the RPMs increase to a force approaching 1g the wave pattern will shift accordingly. Again, this is assuming minor physical stresses is responsible for causing various components to bend or warp slightly as simulated centerfugal g forces increase.
Regards Steven Vincent Johnson www.OrionWorks.com www.zazzle.com/orionworks
