We rebuilt the PA speakers at spring cleaning and now have a slight problem with them. When we pound the speaker poles into the ground it mushrooms the end a bit and then the speaker mount doesnt slide onto the pole. Anybody got a good idea on how to best solve this? The pole is standard ¾ inch metal conduit and the mount is a standard threaded conduit end. My best idea so far is to mount a 6 inch long ½ inch diameter rod on the speaker that will slide INTO the pole. RZ