Just got done regrinding this one with a full convex zero edge. Also removed the hump and rounded the whole spine.

[Linked Image from farm4.static.flickr.com]

[Linked Image from farm3.static.flickr.com]

[Linked Image from farm3.static.flickr.com]

[Linked Image from farm3.static.flickr.com]

[Linked Image from farm3.static.flickr.com]

[Linked Image from farm3.static.flickr.com]