This top throws well and is fairly balanced (at least with my print settings). To get it to spin, the string will have to be shorter than most strings that come with other spintops. I found it best to experiment around with different lengths until it worked.

Update: The tip I designed for it broke off after a few throws. Replacing it with a tip from the Duncan Imperial Spintop will result in better performance but you would have to drill out a bigger hole for it to fit, so I modified the top to have a bigger hole to fit the Duncan tip (Top V2). I also redesigned the tip with a bigger peg so it won't break (Tip V2).