The very first quilt I made, I marked every square and made lines. I have a table sewing machine. Now I use the pressure foot as a guide. I don't make quilts for shows. I of course had at the beginning of my quilt journey wanted to be PERFECT and got upset when my squares weren't lining up properly. Instead of enjoying the process, I was getting stressed. The wonderful quilters here gave me some very good advice.
If you can't see any mistakes while riding on a galloping horse, I would not be worried about it. Relax and enjoy yourself. That is not word for word, but, I did get the meaning and I am more relaxed and enjoy what I am doing