Quiltingnewf,
I like your solution what to do with your fabrics.
If you want to make 3D bow tie blocks, all of your squares need to be the same size. Do a Google search for 3D bow tie quilt block and you'll find a lot of tutorials. I've made several 3D bow tie quilts.
https://www.flickr.com/photos/391684...7635394061329/
Sharon