On April 29th I contacted Optimal about BG feed for the trial. A discussion was had that questioned the comparison of multi-sized particles and whether that would be apples to apples or not.
11 Days later I received custom sized Optimal BG in perfect round, 3/16" pellets-at my door step.
I like the idea of larger pellets. The only problem I see is that the experiment may not actually be transparent. One vendor seems to have been given a heads up about the trial while the other has not.