I opened up a can of worms & took the rubber bumper off & was amazed that a 9" app. 1/2 " diameter hole drilled & filled with some kind of foam shit. I dug out the foam & curious what i can fill it with other than plugging it with a wood dowel. Anton at shuriken said they often do that to bring the weight down. Any help would be appreciated. If the best thing is to plug it i can have my friend who makes cues locally plug it but that involves some labor & cost. If i have to is there an alternative as i dont have a lathe.