Well, I had two more shear breaks since I last posted about it in early August, with the second one this morning. I hit a good serve out wide in the deuce court, got a slightly mis-hit return, and went for a warp speed forehand winner down the line. Which was great until the ball bounced sideways a little bit and I caught the ball near, but not at the frame and also off-center. The shot was a winner, and I got another shear break.
Here's the section poking out through the frame:
And the section that is inside the frame, showing again what looks like a void in the string, or possibly poor mixing of the materials that make up the string. I guess it could also be a shadow, but it doesn't look like it:
This string had maybe three hours on it. In it's position, the longer main would have had 44 pounds and the shorter main would have 42 pounds of tension. There isn't any sign that there was a twist as it went around the grommet.
The faith is getting shaken a bit more with every shear break. So I guess I'll be string testing for a while. First up, Cyclone Tour, a string I've never tried.