One chad, two chad, three chad?

Well, Faldage, I see your point, but MW Unabridged disagrees with you on one point in that a single piece can be called a chad--and with two you can add the -s:

Inflected Form(s): -s
Etymology: perhaps from Scots, gravel
: small pieces of paper or cardboard produced in punching paper tape or punch cards; also : a piece of chad