Hello, I came for advice. When I stitch multiple layers of the leather (different thickness or skived edges) sometimes the stitches are crooked (see attached picture).
Before stitching I glue each layer of leather together, mark stitching lines a make holes with pricking iron. Can you please tell me where the problem is? Is it bad angle of pricking iro? Or should I use pricking iron separately on each layer and then somehow join in together?
Thank you very much for your advice
Jan Kupka