I use no power tools and no more than an axe, wood file, and sand paper. I often grab a sharp flake when I'm working my bows. I work them green, as I think most prehistoric Northern Native Americans did. All my arrows I make with obsidian, including the foreshaft hole I drill out and knocks. That includes cutting the plant to begin with. Could I use a serrated knife, sure but what fun is that? Grab my little serrated obsidian flake and i'll have that puppy cut in 20 seconds. This is what I like though, and that's why I do it. I don't NEED to be primitive but I enjoy the challenge of learning that process. That takes nothing away from those who use power tools, just want to make that clear.
I steam reflex all my bows (semi-green), no heat guns or anything. I don't own a whatcha m'a call it "bow horse" or whatever. I like simplicity and don't have the room quite honest for a plethora of tools. Never used a draw knife! I do own one though that my friend gave me.
I really don't think it took them much longer than we take to make our bows. Maybe not the sheephorn/sinew bows of the Rocky Mountains (thats just plain time consuming primitive or not). The ingenuity and skill with their tools would have been interesting to see.
Nothing against those who use power tools, we live in a modern world, but the word Primitive on this website (at times) could use a small little asterisk next to it. Oh boy I hope I'm not offending anyone! I enjoy looking at all the different bow types on this website and I think that diversity is great.