Yet another thing we disagree on! 

What exactly do you think is too small about it? In the thickness, or the length? Either way, yes, I disagree with you! I only ask though because the thickness photo is near the tip, so show the sapwood ratio. There is definitely enough meat to get a darn 200# bow if you were crazy enough, and then some. If you are concerned about a 68" - 69" 100#-ish 32" draw osage bow... well..., you shouldn't be.

It has been done many times.
(...Ryoon, I think you might just be wussing out... ... j/k
) Either way, your choice. The offer will still be on the table if you change your mind in the near future.
EDIT: Also, if I had a bigger stave, I would send you one.