Really it looks fine. I would use nails though. IMO it is a waste of time to raise the pelt up on the nail however I do like to have the fur dry before stretching.
Couple things I do different: I cut the lips and nose off, just stretch them out past your circle but nail at the line and trim off the excess when you are done.
I never pin the front legs but that is just me. A lot of guys do that.
And I cut the ears off. Dries a lot faster with them gone and they are going to whack them at the tannery anyway.
