My initial solve was 100 instructions (I named it "Turn of the Century" as a pun), but gradually shaved the score down to the high 70s. Then while working on cycles I rediscovered the conduit exchange tech (as I call it), where atoms can be dropped on the opposite sides of the same conduit without colliding. I wasn't sure it would even be useful until I tried using it to replace two arms in the left sector by moving the quicksilver to the one cabinet where it's never used. That's the tri-arm; a hex-arm would conflict with the other, and a bi-arm (with the quicksilver input) was too finicky to get the quicksilver to the right conduit.

I kind of regret needing three pistons to output chunky mors, but the space is quite constrained.

Working on both cycles and instructions alternately was an especially great help in learning how to improve the output sector. I'm quite satisfied with this *nice* solution.