Thanks to a Tony Fisher video showing how he took the Tangram Cube apart I was emboldened to pop a piece or two out and pry a cap off so I could lube the noisy spring. Now it is much quieter. After figuring out some algorithms to solve the puzzle I continued to play with it and discovered more efficient ways to solve certain pieces. Refining a solution strategy is part of the fun and this cube has given me lots of fun in the week and a half I've had it. Because a couple of the pieces have minor flaws where the two different colors of plastic come together I wouldn't give this a 5-star rating, but if I could I'd give it 4.8 stars. And if you get the black puzzle with stickers, it probably wouldn't have this problem.
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