"He who marches out of step hears another drum." ~ Ken Kesey
Not that anyone asked, but I have two. I use one daily on every screen. I use the other one, still new, to make sure the daily used one is accurate. If I have to adjust more than 6-8 Newtons on the glass to get it back to zero, I'll send it in. Screen tension is important to me. I am a SCREEN printer.