A Peltier Ruby Bee, the av. is super fine silver powder you can see a little bit in the red ribbons by the suns reflection. Like most Ruby Bees the majority of av is in the deep recesses of the red ribbons where it becomes very thick. I put it in the sun because it's the only kind of light I could make the small dust like trace av show.
Yes, been watching him for years, he's made a few improvements and did a few experiments w/ different instrument attachments, I really enjoy it "Thanks for posting it William"