I couldn't find a layout for B3, it always seemed to be lacking space for arms, it's probably a skill issue. As I am not conditionally inclined, I instead just threw pistons into the free space, put on my pajamas, and went full B1-and-B2 on this B4. Wailing unrelentlessly on the instruction tray, praying for something majestic to fall out. I was hoping for a Symphony by Beethoven, but unfortunately, I got a painting; by Stevie Wonder, at least at first.

On a more serious note, from the first iteration of this solution, I shaved 1/3rd off the period and about 4 arms. The first solution had a lot of intermingling hands touching ALL over the bonders in a rather vulgar fashion, and just like a trip to the tunnel of BEES, it was far too sticky and quite painful to work with. I didn't have to change much but I eventually -somehow- found space for all my arms to do their business. And like with most arms, it was usually in the corner, away from prying eyes. Eventually, the more secluded ones got the axe for the unspeakable things they were doing back there, and their workload was comfortably distributed among the proven few.

With a more elegant Reactive Water setup, I could see this solution dropping a little in secondary.

Edit: I Found a way Arm 5 could handle the copper on his lonesome, relegating Arm 7 to bucket duty, bringing input speed from 6 cycles to 4, but dropping us only 4 more Period as opposed to the expected 6 as Arm 5 is now holding the solution back from running at arm reset speed due to it re-grabbing the silver, the over-ride loss is 2 cycles which I'm not too unhappy with, looks clean, someone might even be fooled into thinking I know what I'm doing.

I'm very curious to witness if there's fractional-P wizardry coming up.

And as always, looking forward to the show.