Sorry. Busy weekend. I would like to weigh in on Torres' observations and the resulting discussions. First, I need a better understanding. The points I have taken from the posts on this thread are: 1. Monogut ZX is mainting tension. 2. The power and comfort are both lasting. 3. Control is not problematic. 4. The strings are not moving. 5. There is a decrease in playability after playing for hours that can best be described as a loss of spin. Torres: Is my summary accurate? Are there any other definable characteristics to this decrease in playability other than the loss of spin?