Glad it worked well for you
1) If you did not get more than 8 connections automatically, that means that you should open port 9901 at your router. The procedure is the same for Tor end regular mode.
2) Yes, you can just transfer wallet.dat to your Peerbox.
3) There are no disadvantages of using QT wallet. There are just the same and equally secure, however QT wallet is not yet well integrated in Peerbox. That means some of
peerbox -* commands will not work.