Hi Sal,
as I took the first look at this bladeshape... I thought of a rhino and didn't like it.
My second idea was, how the blade would look like, if i grind the dimple of.
Like a droppoint, keeping the curve on the back of the blade. It would be difficult to open only by the small spyderhole.
But if I buy it like this, the dimple would'nt survive very long.
We can disuss the question of a nail nick, but my own experience is that nail nicks are dificult for many to use. Many don't have nails or their nails aren't very strong.
Depending to the stiffness of the lock, you don't need your nails with the nailnick.
Just the improved grip in this area is enough for me to open.
Maybe a longpull, like on other traditional knifes, would be suited.
It's a difficult progress to design a knife meeting the laws, keeping the spyderco design and the customer wishes.
You talked about the possibility to open the knife one-handed with some tricks. Of course it should be a two-handed knife.
Even an Opinel or a standard Victorinox could be opend one-handed, but nobody would think of an illegal carry item.
If your design will be as hard to open like these, there should be no problem. Especially with a Backlock with two locking positions.
In this design spyderco is pushing it to excess to meet the law. Form follows law. Maybe you could achieve this by the technics inside, instead of dimples.
Please don't be offended by my 2cents. It's difficult for me to explain in english. It should not sound harsh!
Thank you for your patience and including your customers into the evolution of your design.
greetings, Jan
Edit: The clip should be the wire-clip. Like on the UKPK. It's not a dealbreaker for me (because the knife is legal to carry) but it would be much more appealing to me and hidden to others.