That is a super cool project.
Here is how a pro makes a similar project.
Original Boreal Shirt made from a 6 pt Hudson Bay blanket
https://www.youtube.com/watch?time_continue=5&v=VgDzNtvqCVA&feature=emb_logo
I watch this looking for details.
I want to have a full understanding of the process before assembly.
Very close, but still not happy with setting the gromets in the wool even with a webbing backing???
I might try a leather strip on both sides?