I may have been wrong on the width but, I know somewhere there were rules about barbs. I investigated this some years ago, though the rules can change. Also, somewhere in your game law book there is a statement about those not being the only rules just the basics.
Don't mean to upset you as your work is really good. I'm just trying to watch your back Brother. Wouldn't be worth a fine or confinscation of items made if.n you were ever stopped and checked!
I'll be rooting for your success!!!
Here's one I took a few years ago with a Woody Blackwell head! Thanks Woody!