Hey guys, I am sorry to hear about all the problems you are having with the new style 10W heads. I ordered a 10W slug as a backup back in Sept. They sent me the new style, and I fought to get the old style, as I wanted to slug to go in my pocket incase the 18W goes out (never happened, but.... ). Aside from the fact that the new style would not have worked for this application, I am glad I fought enough to get the old style.