Brad – 12 ½” is doable, but the longer the better. Wide enough to fully cross a billet being ideal, but the shape is maybe more important than the length.

Here's a maybe, it is described as fully tapered, though they lose me with the “razor sharp” line. Froes do not need to be sharp in the common sense. I 've not seen one, but they might be worth asking after - http://www.traditionalwoodworker.com/product_info.php/cPath/36_387/products_id/4949

This is a shot of my current horse, Pegasus IV – Taking the Drawshave to Locust for the upend of the Windbracing on the recently wrapped bridge project.- http://twitpic.com/mhfpg

"We build too many walls and not enough bridges" - Isaac Newton

http://bridgewright.wordpress.com/