Love the farriers rasp. Once I started using it I never touched the Stanley Shurform again. Takes a lot less skill to use than a draw knife. You will be surprised at how fast they will take off wood so be careful.
For a board bow all you need is the farriers rasp a 4 way rasp for the fades (curved side), scraper for the finishing tillering, and something to cut the nocks. Sand paper to make it pretty.
Keith