The Z1-3 are great for aid. They can work in thin cracks instead of pins. You do have to be careful, though.
I had placed the Z1 on the 4th pitch of Re-Animator in Yos and moved up on it. (Didn't bounce test it, cause it's so small.) While fumbling around for the next placement, I heard a bit of a ripping sound. Since I was still on the gear, I assumed it biner shift. After moving onto the next piece, a rivet, I looked back and noticed that the Z1 had shifted and I had been standing on only two lobes.
Bomber, dude.