I have a Hegner I bought new about 18 months ago. I use the quick clamp but have never had that problem. I do not count turns. My process is to install the bead, push the lever above all the way back, tighten the screw at the back until plucking the blade gives a high C note. Done. I find that as long as I'm using the same size blade I seldom have to re-adjust the back tension screw.