Installed front and read (mid) strut brace today.. question

[Dragonwind]

The rear brace was difficult to get in because of the angle. I finally got it installedbut the directions say not to over tighten the tension. It was already pretty tight and I couldn't adjust the bar. How do I know what is too tight?
I took it on a test drive and took a hard corner here and there and all seemed well at least.
Chris