I did think about doing something like that...
And if it will make you feel better, I suppose it wouldn't hurt to try.

Maybe if I sort of make it like a collection? Like have:

Nino batch
-Nino's letters to all members
-Replies to Nino's lstters from all members
-Nino's response to replies.

Sakurai batch
-Sakurai's letters to all members
-Replies to Sakurai's lstters from all members
-Sakurai's response to replies.

And so on....
I'll start planning it tonight and see if it'll work, OK?