Failure to look at the SN can be a real impediment in all forms of astrological delineation, natal, progressed, solar return, elections, horary, composite/synastry: the SN really does point out the potential weakest point, weakest link, achilles heel, in any given astrological situation: that it is not shown in a chart (it is not listed either in the astro.com pdf tablets of declination!!) can and I think, very often DOES, skew chart delineations (of course there are many especially Modernist practitioners who either entirely discount the Nodes, or look at them only as minor or purely "esoteric" elements of a chart-needless to say I consider such an attitude about the Nodes quite unfortunate regarding delineative-not to mention predictive!-accuracy)