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This is an excellent step by step lesson! I have seen several tutorials, but NONE of them have focused on the construction of the sole. Thank you for posting detailed pictures with your Instructable of that part of the process!
Not without a machine that can sew through multiple layers of leather and the rubber sole. Tippman and Juki make machines that make easy work of the leather-on-leather sewing, but I'm not sure that they could handle welting the sole.