(I asked this in the middle of a different thread, but it got lost). Could someone explain to me the difference between the ND build and the non-ND build? What are the advantages of each over the other? Can I run either on my WRT54GL? Someone mentioned, offhandedly, that ND was better for WDS. Is there any reason this should be so? Should ND be running on both sides to get the advantage? Any enlightenment would be appreciated.