Analysis

This solve debonds the final seven atoms in completely different ways; one that calcifies and one that doesn't. Amusingly, they're exactly as fast as each other. The one that doesn't calcify has a very clear latency advantage and further 6P potential, so that one outputs.

Origin Story

Initially I assumed 27 was min. So I programmed a 2-piston solve thinking it would be quicker. Only to realize that one of the pistons was never needed and I was sitting on a 26 the whole time. I then cut over 200 cycles through a ridiculous number of micro-optimizations (sorry panic).