My "new" '74 Duster- or why I need a project like a hole in the head

Technically I think the terminals included are probably right on the edge of being able to handle the gauge on a couple of the wires in the ignition switch pigtail, so you kind of run into a scenario where the double crimper is too big but the single crimper is a little too small. I definitely wasted a couple terminals doing the ignition switch connector.

Are the double crimpers for crimping multiple wires into one terminal? I assumed it was for crimping both the wire and the insulation at the same time.

I've been looking for a crimper that will do multiple wires in one terminal and come up blank so far. Guess I need terminals that work for that, too. Haven't looked for those yet.