....looks like a bit of character to me.
I wouldn't worry about making it look "better"
Exactly! Scrape out any actual pith smooth and polish it like the rest of the bow, and tell everyone it's a built in ashtray.
Or even better, tell em, it's a scientifically designed parabolic depression which focuses the lines of compressive force back down the centreline of the bow for enhanced limb recovery speed
![angel O:)](http://www.primitivearcher.com/smf/Smileys/default/angel.gif)
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Del