Well since I've gotten back into bowling I've thrown a lot of different equipment from Big B, Columbia, Ebonite, Track, Storm, Roto Grip, Visionary, Morich, Lane 1, and Hammer. That being said, while I found traits that I liked in almost all of those, I've settled down to just two. My "primary" would have to be Roto Grip, whom I was hesitant to try at first because overall I felt that I didn't match up well with Storm. However, all of my Roto Grip equipment just works well together, and gives me a certain level of confidence. My second choice would have to be Ebonite, I know a lot of people complain about their coverstocks, but that has never been a problem for me. I own a TNV that has well over 150 games on it that I keep clean and bathe regularly and it's still going strong, also my Gamebreaker is probably one of the most versatile pieces I've ever owned. So with that being said I'm not opposed to trying other balls, but I just feel very comfortable and confident in Roto and Ebonite.
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