I used buttons to make the details. I also did not include the holoprojector detail.
The gauge was a little off and the beanie came out slouchy - totally okay for me.
I gave the pattern four stars because I had to re-write several of the rounds to understand them and get them right. This is definately not a pattern for beginning crochet enthusiasts. Check out my attached blog post for more photos and how I completed this awesome hat!