My least favorite process which involves crawling around on the living room floor sandwiching and pinning layers. Cat Management failed to warn me that the batting I had on hand was 5 inches short on one side. Replacement batting purchased. Also had an issue with the tape I had available to hold the backing in place. Long story short, found some wrinkles on the back side.
This quilt is for me, not for judges. So I decided the wrinkles were fine. And will be less noticeable after washing when everything scrunches up with shrinkage.
I made a template a year ago for a Sashiko inspired center. Meanwhile I forgot the planned geometry and my first one has some sections that are off size. If I hadn't told you, you wouldn't have noticed. It's Fine. The first time I went bold and used a highly contrasting thread, I was able to produce tiny stitches (8 per side) because I used a silk batting and a plain cotton backing.
Due to the combination of cotton batting and 2 layers of white on white fabric these stitches are 6 to a side. It's Fine.
Sometimes I get distracted by my marking lines and it helps to look at the back. These are the organic flowers that I FMQ on the joining corners of the blocks.
In the end, it's all going to be just fine.