Russell,
Always try to get your glue lines as "perfect" as possible. With a non-working handle, you do have some wiggle room, but build good work habits in the learning stages and you save time later. Maybe I should say " Do it right the first time". Remember "Close counts only in horseshoes, hand grenades,
Artillery, and nuclear bombs, as well as cow pies"! Learn to use your hand tools well, and get the fancy stuff when you can afford it. Check around the local "horse people" for a farrier who may have some used files for sale or trade, or even look on line. Most farrier's upgrade to new rasps as soon as they notice a slower cut, it is one of their primary tools.
Hawkdancer