32 Gear Spheres
Here is a collection of 32 gear spheres that all have perfect pitch circles and phase. As a general rule, the number of blue gear teeth must always be divisible by 5 and the number of yellow gear teeth must always be divisible by 6. I discovered all of these configurations on or before 10/6/11, except for the 30:30 configuration which I discovered on or before 2/7/11.