I'm just checking out the forums for info about full bodied double basses with removable necks (RN). As this is an important topic for every bassist travelling abroad on planes I'd like to suggest a special forum for this topic. Joe Fonda bought a RN bass just recently in the US. With this solution the neck is stored inside the body. This looks smart on first sight but - as a matter of course - it has a ruinous impact on the sound of the bass. There's a much smarter solution offered by Christopher. You can watch a video about assembly and disassembly here. I haven't been able to check it out live but I'll have the opportunity to do so next week. Travelling with their own instruments obviously is a serious problem for musicians who prefer to play an authentic double bass instead of any "caponized" substitute (apart from the fact that every musician prefers to play her/his instrument which (s)he has grown accustomed to. I think that's reason enough for offering a special forum to discuss and share info about RN basses.