Two bad news to me.
The first, the new string (Weiss) on my K-90 gives me a weird feeling when I do fore/back hand strokes. I don't know how exactly I can describe. It feels like the string couldn't hold the ball at the contacting moment. Thus, my stroke looks really weak. I still can control the angle though.
Second, the C-10 racket won't be in my hand in this Fri because of the lazy USPS delivery system.
I wish I could change the string by myself.
I am on the court.