I'm leaving shortly on a brief business trip to the UK. I'd like to bring along a small bass (30" Rob Allen Mouse), but I don't have a hard case for checking it. What are folks recent experiences with carry on? This bass is quite small (gigbag measures 41" long and is V-shaped -- around 6" wide at the headstock and about 15" at the body). I''d really like to bring it, but I'm scared to death that I'll get to the airport and United will force me to check it -- in a gigbag!