Hi Chip,
I have kept a group of them for about 4 years now. They are not the easiest plethodontid to get acclimated to captivity, and they don't all thrive in a simple shoebox setup for very long (learned the hard way). Now have them in a larger setup (92g corner) with lots of LARGE slabs of metamorphic rock and some trickling chilled water to give them lots of moisture and temp gradients. I have 6 together in this setup and honestly I think they should have more space. They still have some aggression issues and I'd like to spread them out into pairs in the future. They are huge plethodontids and don't tolerate temp swings/higher temps very well.
I've seen courtship but so far no eggs. I'm overdue to change things up and try something different to get them to reproduce.
Let me know if you'd like any additional details.
Tim