Rutan
Have never used the one's you purchased but in the mil with what was goddam awful headsets, I used a piece of elastic on hooks that went behind my head and under that little bump at the base of the skull.
One end had went through hook and back to a Buckle or such like that allowed one to pull one end of the elastic to tighten it once on the head and so increase the pressure between the two ear pieces.
It worked and meant hands free for what I was doing at the time !
Hope that helps.
Last edited by 500N; 16th Jun 2014 at 20:59.