thimblebug6000: yes, they are quite sturdy in construction. I'm doing the LA work so I can manage the tension.
the stitches per inch a plentiful! I had to look closely to realize that they were hand stitched.
I'll know for sure once I get it on the rollers.
I didn't even think to go to the LQS to see if they had a similar muslin! thanks for all of your tips everyone, this is so helpful. I've been ruminating these backings for at least a week.
I cannot wait to see them finished! I love this period of quilts. Bright, cheerful, hopeful.