These are definitely concerns. For me, I also have a "mind set" problem. It seems to change from "I get to do leather work" to "I have to do leather work". Another might be deadlines. As far as machines go, I'm no expert but I'm not sure you would gain much machine stitching knife sheaths over hand stitching. I do have a couple machines and enjoy using them though. As always, JM2C. Jim