The fact that (I think) you can't load anim at min rate in 2 arms is annoying, but it's more efficient to add another arm than it is to actually slow down the machine.

-1a on the outputs (saving critelli hex) is probably possible. I don't think I can save the area used by the disposal arm, so it'd just be cost savings from there. There's no way I have optimal cost, but it feels like it'd be really annoying to save more (change one of the pistons on loading anim to a normal arm).