Disc is picked up, we're set up in a split stack
Disc moves to handler on the side with 3 cutters.
4 and 5 cut across. 6 and 7 push up. 3 moves center to set up a cut either deep or under.
3 receives, back of side-stack (6) continues.
Continuations can run from side stack until flow is disrupted. We then get the disc in a handler's hands and quickly move into vertical stack