Guys I need your help. Having a little trouble with the old brain and I cant remember how to set my barrel for .002 set back.

Yes I have 6mm-BR Go and No-Go gauges and I know how to use them. Such as on the No-Go I should see the bolt fall to about the 2-3 o'clock position to save on brass.

What I am getting confused on should I set the barrel using the Go gauge with one or two pieces of tape for a .002 set back? Or do I put the tape on the No-Gauge for a .002 set back? [Darn anesthesia anyway! I feel like Joe Biden some days!]

Thank you all!

Larry