Red, I added the osage because I came in under weight. I scraped the belly flat, then glued a 3/16" slat on each limb. I heated and bent the osage to fit up into the fades, then glued on with smooth on. I needed to gain back about 7-8 lbs. After retillering I ended up with 1/8" or less at the fades and almost nothing toward the tips to get the 7 lbs back. As Pearl Drums told me when I inquired about adding slats to the belly "It doesn't take much osage to put 10 lbs back on a bow".
The fox hide was tanned, then cut into strips and applied as Cuban Missle mentioned above....Dan