[Kerry Irons]

Why?

Building up an XR-300 around a Powertap 32H hub and chose to go 3x drive side, 2x ND. I've built a standard 3x before, but I'm not sure of the lacing pattern for the 2x side. Any diagrams anywhere that show 2x?

As Mike T. said, you simply cross two spokes instead of 3. It sounds like you might be overthinking this. Beyond that, what do you feel is the incentive to have two different cross patterns on the DS and NDS of that wheel?