Glen, not everyone will like the technique. I use it out of necessity. Here goes. I'll try to explain it.
Hold the knife in your right hand, as if you are about to open it in the normal "thumb" fashion. Place your thumb against the thumb stud as if you are about to pivot the blade open. Your opposite side fingertips should be clear of the blade, ready for opening.
Now move the thumb back a bit. You are NOT going to be using your thumb. Instead, your thumb is going to hold the knife in place.
Bring your INDEX finger from the other side and place it on the same side panel as the thumb. The knife is now held (like a push dagger) between your index and middle fingers.
Place the index finger nail against the thumb stud. Now snap your index finger forward into a "pointing position," pushing at the thumb stud all the way. If you snap the finger fast, with the blade pointing down, the blade will whip open and hopefully lock up. I also call this the POINTER TECHNIQUE.
Practise it a couple of times, then try it with your eyes closed.
Tips - doing it with the knife pointing downwards will use gravity to snap the blade open. If the blade pivot is not as smooth as you'd like, use your normal wrist flicking action to help. Imagine trying to flick a ball of fluff off your jacket with the tip of your finger. That flicking action is stronger and actually longer than anything your thumb can do. By first placing your thumb against the thumb stud, you are "indexing" or marking the position of the thumb stud so your index finger will find it easily even in the dark.
The advantages are - its something different. Its actually more positive. BUT the big diff is, wheh opening a non-assisted folder with your thumb, your thumb is the only finger holding the knife on that side, and its expected to flick and move around as well. At that point of the opening, your grip is very poor. Hockheim's SFC martial techniques exploit that momentary weakness to whack the half-opened knife out of your hand. Even without someone trying to whack your hand, try opening a knife 100 times after 50 pushups or with wet hands. I counted that for someone who can open a knife half-asleep, in the dark, not knowing what knife it is, the knife actually fell out of my hand 3 times in 100 draws.
having the thumb there but used in a pincer fashion to secure rather than trying to do 2 things at once, is the key to security in this method.
Once again, it won't suit everyone but it might. Tell me what you think. This is an exclusive preview to this technique.
Cheers.