^^^
You're right. The tension bar applies a constant torque which is always there. It simply adds to the torque from the dropweight (which is by far greater).
I just meant that, I neglected that part when I wrote down the equation using the dropweight as the sole source of pulling force.
Indeed, it does not introduce an error in the actual stringing of the racquet.
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"Physics is like sex: sure, it may give some practical results, but that's not why we do it." -- Richard P. Feynman
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