I string with a Klippermate. Recently, I noticed stringing an Head i.s10 that the racket bent slightly when I dropped the tension weight. I inquired into whether or not this was normal. I got this as a response, and coincidentally my main customer uses an i.s10. So what should I do relating to the bold part of this quote? His advice-"Regardless of the stringer, there will be some frame flex. If you clamp your frame properly in your Klipper, you should have no problem. " There are certain frames such as the Head iS10/12 that recommend a stringer to drop the tension if the machine has a 2 point (like your Klipper) or a 4 point mounting system. However, these are rare. I started on a Klipper many moons ago. " Should I drop tension, if so how much. I have noticed the frame bends when I apply tension to each cross string.