The process of making a sandwich went well. I just pinned the sandwich (taped the back down) using all my safety pins.
The quilting have been easy and pleasant. I decided to do both machine and hand-quilting. Saving a sore shoulder machine quilted about 1/2 of the strings. Using a lot of different thread: different weight, different brands - but matching thread color to the fabric. Just removing the safety pins as I go.
Once I couldn't match up my thread to more strings, I proceeded to hand-quilting. Again, I used a lot of different thread qualities, even used some variegated Valdani embroidery... I have had a thread fest!
I think the wool is a bit more forgiving than thinner cotton when it comes to stretching out the fabric and avoid wrinkles. Maybe this random quilting helped too.
Tonight I'll try to store up more of the lovely colorful Finca no16 (similar to perle cotton) from my supplier "Bitteliten" a one woman shop. This is my favorite choice when I want to emphasize the hand-quilting.
Like some of you said, it's quite nice quilting through wool. I also enjoy how wool doesn't beard on your clothes, it's a lot less messy... and my cat adores it! She's found a new favorite - again.