I have made a few by hand, actually 140 selfbows that remember, probably a lot more that I don't have on record.
I do use a band saw to rough out the blank and a belt sander to square up the edges but everything else is done by eyeball with a rasp, file, scraper and a bit of sandpaper. I also use an orbital palm sander to get rid of the washboard belly effect that often shows up during final tillering.
I am out of action at the present, if things at home continue to improve I should be making bows again in the spring.
Bob is the most knowledgeable person around when it comes to traditional bows. He has several of mine.