I'm looking to add some new puzzles to my collection. I'm looking for well built puzzles that aren't disentanglement puzzles or lock type puzzles. I don't really know how to explain what I'm looking for but a great example is this: http://www.puzzleatomic.com/FLATLAND%20GEARS.htm
I'm looking for puzzles that don't have redundant ways to solve it (such as putting a cube together, or figuring out a lock).
If anyone can help me, that would be great.