AutoCAD Inventor :: Planetary / Cyclical Gear Systems

I'm trying to create a few sets of planetary gears and I'm running up against a wall here.

Both sets, for simplicity, need 1:4 ratios which makes the planet and sun gears the same size. I was using 20 teeth for the planets/sun and 60 teeth for the ring which based on my understanding of the ratios, should work. My problem arises when I attempt to get all of these gears(sun, four planets, and the ring) to mesh and rotate.

I can't figure out how to make sets of more than two gears using the Spur Gear tool. When I make the other gears on their own and add them to the system, they don't inherently mesh and pass through each other. Obviously I'm missing something here because I clearly need more than a two gear system.

As a side question, is there a method(Derived Parts, maybe?) through which I can add to a gear made with the Spur Gear tool to create a new part that will still function as a proper gear?