I tried for way too long at period 4, eating up the better part of 4 days.  I first tried to disassemble in the left, which I got working at 1/8 P and 1/11 P.  But then the other chamber never seemed close to working.

Then I moved to this layout, in which the right chamber disassembled, did berlo, and output the water.  At first, I could pass 2 air and 1 fire through the conduit, but that left far too much work for the left.  Then I reworked it and found the version seen here, which allows passing three fire at 1/9 P and period 4.

The next two days were a major roadblock.  I found many near misses for the task of fires->output but nothing actually worked.  I got really burned out.

On Friday I spent a couple hours on period 5, eventually succeeding, first at 49I and then at 42I with a smarter right chamber.  The solution title was "undercooked bacon" because I was very disappointed to fall short of period 4.

I built the showcase "Nonconforming catharsis 2" in reference to the week 1 lexC showcase 9 [2 6], out of my closest near miss period 4 solution.  There was one piston in the chamber walls, and an unused hex in the other corner of the left chamber.

Then, during my road trip on saturday, I thought about how I could use the motif that worked at period 5, at period 4.  It required two synchronized arms passing the molecule back and forth between output and triplex bonder.  Working backwards from that for another hour, and I finally got it.  I have beaten the pig.  Here is my fully cooked bacon.