Have never done either so I 'm of no help. ..sorry.
Oct 1st is fine with me.
Seems like the ultimate finished size will be dependent upon the size of the starting center...am I thinking straight????? So maybe we need a minimum to maximum size for the center rather than the finished project. Is that what you meant Jane? Or do we need both so others can gauge the size of their borders as well???
Mine will be an appliqued and embroidered smiling sun so will need to know center size for square or rectangle so I can draw out my pattern.
Yvonne