I mail-ordered my most recent pair of DM shoes. I've just googled the technical names for shoe parts and, whilst the fit was perfect, the cuff was too tight and the counter was curved forward to such a degree that it blocked clean entry of the heel, crushing inwards, if rushed. The cuff tightness prevents a shoe-horn from helping and resists all hand manipulation.
The over-curved counter then proceeded to take the skin off the back of the heel, during breaking in.
I would have liked to found these techniques at that time but, as the general fit is perfect, how do I confine the stretch to just the cuff and counter?