This feels like "surrender flare 16c meets stabilized water 15c" in the weirdest way.  It turned out to be possible to get 15c directly with a looping solution but one of the mechanisms was a track loop with 3 pistons on it.  In an attempt to save money, we combined the loops, downgraded a piston, reused an arm, and then added 30g anyway to fix the mess.

Other approaches to 15c would likely use a lot more glyphs, we had a few "2 by 7" pipelines that didn't reuse any bonders between the pipelines.  Hoping we end up on the cheaper side even though we got nonlooping piston spaghetti.