Nice looking bow from what I can see. Osage is called by many names, you're referring to Bois D'Arc, but it's also called bodark and hedge apple among other names. Hope to see a full draw picture on your bow. 61" requires pretty good tillering for 28", you've done well. I've never tried to make a sapling bow, but perhaps I need to be watching for a clear sapling (if such a thing exists). Dealing with knots is the price we normally pay for using osage. I love osage, suspect you will too.
George