Whoo!  It feels good to be back.  I hope this does well.

On my 5th try I got period 5 and 15i, which is where I got the perfect solution name from.  Then, unfortunately, I made it better.

I figured out the 6i end sauce, found it worked with a reagent half every 3 periods, then struggled with the geometry of the rest of it for far too long.  After finding the 15i, I thought "maybe the first-half delivery arm can be cut, and the second-half delivery arm can be increased to 4i to make up for that rotation."  Turns out I could just outright cut the arm and have one of the hexarms make up that rotation.

Tri-arm for swag.

:) :) :)