Well of course, if someone in the area happens to have a Crane system duet concertina I could borrow for the weekend, that might solve a few flight problems - but I reckon I'd be better off bringing my own. Of course, it's a lot smaller than most instruments, so I don't think I'll have problems bringing it as a carry-on, even now. Bet I get asked to play it at the airport again though - just to prove it really is an instrument.