Thanks for the kind welcome and great feedback. I shared your input with our R&D Dept. they love getting suggestions and act like it's Christmas when they get feedback.
Couple more questions:
It looks like most dive knives have a double edge -sharpened on the top and bottom of the blade. A good thing in your opinion? Would a knife be any safer/easier to use if it were sharp on just one side? Should the sharpened side be serrated, plainedged or half-and-half, and on the top of the blade or the bottom?
Most line cutters we've seen are positioned on the back of the blade. Is it ever difficult underwater to get the line into the cutter? Any value in positioning the cutter closer to the front of the blade's tip? If the knife were aggressively serrated would it need a line cutter?
Strangely, the challenging part for us has been creating a sheath and how that sheath holds and releases the knife. We're trying for something left/righthand friendly that's secure without being hard to draw the knife from. A terrible thing to loose your knife.
Our proto is solid H-1 steel construction with thin FRN (fiberglass reinforced nylon) slabs attached to the handle's sides. No cavity. What color would you consider most visible underwater for the slabs? Should the sheath be a bright color as well?
LOL- tired of all my questions yet?
Thanks and happy (upcoming) turkey day!
Joyce @ Spyderco