Thanks for the reply.
4 studio sends is not enough when trying to provide monitor mixes for more than 4 musicians playing live ( a small Band for example).
I suggested this some time ago in the N5 forum and several other users responded that they too would like to see more than 4 Studio Sends.
Inserts, Sends, Direct Routing all have 8 slots per channel, so why not provide 8 Studio Sends as well?