Woo!
Actually, it was none of those, but your comment told me one piece of info that none of the docs did - the object in OnSubobjectCreatedFromReplication() is NOT initialized. Would have been nice to know that. I was getting there with a newly created object with uninitialized fields and thought it was messed up.
Instead, I just hadn’t wired the new object up correctly and now that i have it’s working. Once I did the second property replication step showed up and things are working. Thanks Beej and .
NB: It would be really, really nice to have a high level overview of how this low level stuff works, wouldn’t it? 