Project 2.5, Flawed SketchUp image

Here is my most recent attempt at making a compost rotor through SketchUp. As I have mentioned in my last post, Project 2.4, I will be trying a different system because this is not working out for me. My image easily communicates my confusion with the planes. My plan going into SketchUp was to make a tube which the blade can fan off of. I hope you can see this through my draft rotor. The blades, similar to my sketch a few posts ago, should be smaller and wider on opposite poles of the main tube. I could not accurately capture the twist and gradient of size on the blades, nor does SketchUp allow for me to make the ends of the center rod the same side. I find my drawing more beneficial than the SketchUp at this point.