Ks4J in a post gave details of a customized series he did for IVP dictionaries:
973558.aspx
I think is a great idea.

Wondering what other dictionaries would you add if it was you (power user) the one doing the custom series?
Even if not willing to send a dictionary to avoid being taken away from a particular series, please mention which would be a great addition.
Thanks ahead of time for the input.