I've always flown with my 1912 Gibson A-1 in a Rockbag - put it up in the overheads and then panicked slightly until everyone is seated and luggage stowed away. However this year I will be travelling with two mandolins - one of which is a thick-bodied guitar-shaped Hoyer (cf. 'Framus') which only just fits in the Rockbag!
I am coming to the realisation that the days of me strolling on-board with Gibby strapped to my back are over; I need some other solutions. Any suggestions? However I am not a pro, so forking out $100's for a Hoffee is totally out of the question!