The hardest part was definitely the upper back of the chair.
I ended up making a throw pillow to go with it as well.
Things that I learned: Don't agree to a project before getting a good idea of what you are getting in to!
Oh, I learned something else too, about how when the going gets tough, I prefer to ignor the issure rather than fight though to the end. I now have a much better appreciation for what professional upholstery and small time furniture manufacturers go through. Also, I may not be agreeing to any other reupholstery projects for a while, just saying...