Things were pretty wet this weekend, and so the climbing was limited. Alan and I "took advantage" of the conditions to replace some bolts.
First, I'm embarrassed to say I'm not sure whether the two-bolt top anchor we replaced was at the top of the second pitch of Nexus, or atop Plexus or Sexus. Conditions were so wet that we couldn't get very far out on the edge of the cliff without fear of sliding off, and I couldn't get my bearings as to which route we were at the top of.
Second, this top anchor was in weird condition. The bolt hangers were smashed over flat:
The smashing in question must have happened many years ago for the moss to have grown over the silver colored bolt hanger. Alan and I theorized that some stray hiker angry with climbers "defacing" the rock may have smashed the hangers? Once we returned to our group though, Jim said that he thought they'd been smashed by an infamous, late 80s Pinnacles rap-bolter in revenge for the Nexus first ascent author having erased one of the rap-bolter's rap-bolted routes. That made more sense as an explanation of how they came to be smashed (although it made no sense at all as an action taken by an idiot so many years ago).
Third, we installed two good bolts in very good rock. These were ASCA, half-inch stainless. We did not place the bolts side-by-side due to rock quality (the old anchors did not have slings or chains and to my knowledge aren't used as a rappel station, and so side-by-side didn't seem as important as good rock):
Although the old bolts were well placed for what they were, what they were was one and one half inch long, 3/8" Star Dryvns with decidedly not-modern hangers. I think the new equipment is better (we did pull the old bolts):