I made a hidden zipper backing for the pillow so I could sew all the way around the pillow top. I was afraid if I had to hand sew any opening closed, the force of prodding the edge would break my hand stitching. This way I could avoid that possibility. I found instructions for the hidden zipper by Googling "hidden zipper pillow back".
I cut strips of wool and also strips of silk approximately 1/2" to 1" wide and 4 to 6" long.
I can't for the life of me remember what this tool is called. I have 3 of them and used them for stuffing doll legs and arms back when I made primitive dolls. This one has a small tip and worked the best for pushing through the linen and catching the wool or silk strip and pulling it back through. (Update: It's called a hemostat.)
Always go into the same hole from the last strip. I skipped 3 or 4 holes before coming up and grabbing the strip to pull it through.
This is as much of the finished project I'm going to show. I like to wait and have the class get the first look. I'll show the complete pillow when I get home in July.
I'm happy with the look and it is worth the extra trouble and time to do this.