I use a 15" WOT every once in a great while on the beaches, maybe I have 20 hours with it. I have a separate upper and lower shaft to go with it. The cam lock has failed on the upper shaft. has anyone else had this problem? how did you fix it? I have/am trying electrical tape to build the pressure point up, both on the inside and outside surfaces and it still slips. I can carry a roll of tape with me and just tape the joint, but that looks and is pretty jury rigged. I am hoping for a permanent fix. Thanks for your thoughts. Terry