Damien, Elliot, Jacen, Jack
The usual stuff, things we learn at the complex. Defense, specialized combat, even the gun/knife target practice that Jo had going on. I'd like learning from anyone who can teach.
I doubt they'll willingly give those up either. As for this one.. anyone asks, I don't have it nor do I know who does, less people who know the better (and lesser temptation for someone else to take and use it). Although people might assume one of us does know, if they know we're the ones who were there. My lips will still be sealed anyway though.