Jerry,
I make all my "serious" arrows from 3/8" hardwood, they are self knocks also. None have any "reinforcement" and a friend of mine is still shooting some from a new 180# crossbow.....never had one break yet. But if you want the "authentic" look go ahead and use them.....my personal opinion is they are not necessary for any normal hunting bow. Cane, cerdar or spruce might be another story all together.
Rich