I have a bunch of rasps, but 99% of the time I use the farrier's rasp for all roughing out and early tillering. You can flip it from the coarse to the fine side, and it's big and flat enough to get a good sweep down the limbs. The #49 is a good rasp, but it's small and has a fine cut- it is much more useful to me for shaping handles, fades, and such than actually working the limbs down. I bought a new farrier's rasp for less than $20 at a tack store several years ago, and it's one of the best bowbuilding investments I've made.