It probably is a no-brainer so I qualify. But I'm having trouble fitting the 32308 no-brainer head to my new TCG22EASSLP trimmer. The problem is that there seems to be too much play between the head and bottom of the gearbox. Am I using the wrong adapter; I just took it out of package and tried. There are several more but none of them seem to work. There is also a large bushing but that seemed to be too thick to make it work. Help!