I'm pretty sure this is min now, you definitely need projection and rejection, you definitely need the two track for geometry reasons, and while it's the one I'm least certain about, I think you *do* need both bonders. You could create the products with just one bonder, but that requires a third row the size of the polymer which is clearly bad, you might be able to stick the polymer outputs end-to-end, but constructing that would require storing at least six quicksilver somewhere, and there just isn't enough extra space for that, at least as far as I can tell (cue results stream where 1st place does exactly that)