Yes well spotted, the arrow shelf needs some rounding off on the belly side. I suffered some serious feather wear and tear, but easily fixable.
As for design is was pretty easy really. There are loads of American sites with great buildalong guides with clear photos. Some are better bowyers than others though. For your first go you want something prety simple,(unless your a carpenter or something!)
If your interested look at theseto get you going,
Ferret's Board Bow Instructions John's HomePage Trad Gang.com (tm): How To - Resources
These sites are very hunting orientated so if that offends be aware.
Be happy to give you the details of my one ( though i am sure there a better o copy)