first of all, thanks for answering so quick!
Yes I'm aware that it's an interrail forum, but I thought asking wouldn't harm

I'm also considering coming back via Italy (by ferry), so I wouldn't have to take the same route twice. Could I use the same 5in10 pass in this option? Does someone know how the ferry connection is?
I wouldn't want to flight, but I'm also considering that option at this point...because I'm not sure I want to travel a long way twice IF it's a boring one. But, on the other hand, flying in one direction wouldn't make any sense, if I already got the interrail pass.
Hmm...I'm a bit late planning all this, but it all came quite spontanious. So, if someone has ANY suggestions, in addition to the last ones, I'm very thankful!