That XTC is a tough angle for me. I really struggle especially under the chin. I watched a good video on it and will attempt it my next SR shave. As far as the hart's I am glad to hear that they are working for you. I am hoping to get a W&B as my next SR blade. Would love to get a full wedge blade. In a few weeks I am going to use my felt pad and the diamond spray on the SRD modular paddle strop.