Good lord don't I know the feeling. We do EVERYTHING around here too. It wasn't until about a year ago real engineers would go to customer prem and install NIDs. We still do work at the remote hubs but that's going away and we can focus on the networking side. We've got 2 DWDM rings, a SONET ring and all the gear from core to edge. Not sure how anyone can know it all.
Next week starts CCNA bootcamp, I'ma skared.