This has been the biggest project I've done yet with Fusion 360, and I've learned quite a lot.

• Always start each new document with "Create -> New Component".  This lets you separate your model into pieces-- each with its own history-- and move them around separately.
• Copy and paste components to make multiple copies of a component.  This allows you to make design changes to the original component, and have all the copies of it update automatically.
• Use the CAM tool to output profiles for laser cutting.  That's what I did for the "plates" between the blades.
• McMaster Carr puts 3d models of their entire catalog online, which you can easily import into Fusion 360.  This is amazing. 

I still have a bunch to learn.  When doing a design, do you put the nuts and bolts in, or is that too much detail? Should I be setting up joints?

Also, Fusion 360 has a really nice rendering engine: