I just removed the end caps from my booms to discover that they have cork-like plugs running most of their length. Does the mast have a similar floatation arrangement? I'm making a mast for my fish from anodized aluminum tube and would like some recommendations for floatation if it's desirable in the mast. Would it be better to try and make the mast watertight by permanently affixing the top and bottom caps with 5200 or epoxy? My first impression is that it would be best to keep the caps removable though. Thanks to everyone who has given me great help, information and ideas. They are much appreciated!