I've had the detector for almost a year now, haven't had any problems before. Not too long ago, I noticed the lock nut on the top part of the pole assembly that hooks up to the middle metal pole wasn't gripping as well as it used to anymore. I tighten all the way, but when I use the detector you can feel it wobbling noticeably as I swing it. Its pretty annoying when trying to focus on sweeping an area and pretty uncomfortable on the shoulder. Anybody know if this plastic part is something that I can request from Tesoro and easily attach to the metal shaft myself , or is it something I would have to send in to have them take a look at it?