The binding is the last thing I audition after the quilt is quilted. I'm surprised at how often I change my mind as to what I had in mind and what I actually use after the audition. I have even used fabric that wasn't in the quilt because after auditioning it it just looked the best. When I cut my pieces for my quilt I'm careful to give myself as many options as possible so I have some left for bindings. Since I rarely use a pattern for a quilt I'm winging it when it comes to how much fabric is for what which could explain why I sometimes use a totally different fabric than is in the quilt but it works for me.