Victor,
As always your tests are a fount of knowledge.I always wanted to own one of those BK-7's and before they went belly up they were had NEW for as low as $41.00 on E-Bay. Hindsight is such a wonderful thing is it not? <img src="/ubbthreads/images/graemlins/doh.gif" alt="" />
For cosmetics I sure like your Gryphon,looks like a nice custom blade.
The Yard Guard seems to be the fattest in your photos if that is true I'm not surprised at all. Seems that the Yards motto is Stake your life on it.
Every blade turned out seems to be the absolute maximum in steel content. Hight,bevel,grind,and of course thickness. It's little wonder why these seems to be the best kept secret in the globe when talking about hard use knives.
And Victor, I no of nobody that hard uses a knife more often and better than you! <img src="/ubbthreads/images/graemlins/cool.gif" alt="" />
Thanks for sharing the test. <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />

Peace.