I just ordered a Cronkhite bag for my Yamaha 842. Will it fit in an overhead bin on a typical Southwest flight, and others? Is it safe to fly with this case? I'm also looking into getting an Eastman hard shell case with backpack straps if the Cronkhite won't do for flying. I have scoliosis and therefore a weak back, so carrying the horn around in one hand is simply not an option for me anymore.