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     Duncan is the original Yo-Yo and is still the best. If you know an experienced yo-yo player, like I do, Duncan makes an awesome Flipside. Oldest child has been a yoyo-player for a couple years, so he was stoked to get to demo some products from Duncan. 
     Flipside is all new and features a ball-bearing spacer system that allows yo-yo players to use either a small or large ball-bearing in a single model.