Keep yesterday’s stacks stacked, because we’re starting today by punching out the oval holes. (This goes much faster 5 layers at a time!) Two punches per oval, one at each end, works very well:
Repeat on all the ovals.
Next, fold the stacks on the creases as shown: down (mountain fold) in the middle, and up (valley fold) for the four tabs.
We can finally undo the stacks with a staple remover (or simply by undoing the binder clips), and our units are complete!
Tomorrow we get to assemble them!