Thanks Jackal. Hope you had a great time in Vancouver covering the Davis Cup. Interesting that a pro getting his frames straight from Tecnifibre experiences this same sound. I've hit with many frames from various companies over the last 20 years but have never experienced this particular sound. Thankfully it's not present on all shots. Hopefully I can get used to it because the more I hit with this frame, the more I'm finding it complements my game really well.
Still rockin' the Head Classic 660