The adze itself will dictate how sharp the radius is. With the adze I have I could not easily cut the radius shown in the last picture, it would have to be more gradual. I have seen other adzes which are rounder and could probably cut the curve. I would not be set on an exact design until you have tried a few.
Lehman's is where I picked mine up about 10 years ago. The version they have now is different with the pole on the back and it is blue along with a bigger price.
http://www.lehmans.com/store/Tools___Far...nchorReviewFormI do not subscribe to their overview in finishing work of the adze.
I haven't looked of late but Jim should have a nice one as well.
Tim
