Actually reviewing the description of the Spagnut/Laing I realize now that it wasn't where i thought it was. The distinctive "leaning pillar" and double overhanging cracks on that climb's crux second pitch, are a good landmark. Our first belay is shared, S/L climbs in from the left and we accessed the belay from the right. The hand cracks on p2 S/L were soaking wet and slimy, so we traversed left and ended up climbing a thin groove about 20m left of the S/L crux. Then our crux pitch was only about 10m left of the S/L third pitch, which must have been in the chockstone gully to our right. The routes cross higher up and we finished right of the S/L.
I guess that means the moss gully line to the left of our route was still unclimbed.