Now I haven't used this personally, but I was practicing on open bowling with fried heads and the dude next to us had like, 55 balls he was toying with. The SD-73 (the original) was going through the heads like there was a ton of oil on them, and had a great look to the pocket. I'm not sure if anybody else has seen about or done this, but I found it quite amazing. And also, I bet a plastic ball or maybe even a Tropical Storm (or any other comparable ball) could do this.