Yes. that is it almost exactly.
You are amazing. I envy your talent and resources.
I suspect the nose profile of your last green drawing would work the best. so I mangled it a bit to show a change I think would help with opening in soft tissue. I think the metal insert needs to be rounded on the bottom so that it does not dig into the lead. However, if the alteration to the releif I have drawn is done, that downward force could still do the job.
I also think that I put the hinge cut too high in relation to the internal cavity's taper. You basically filled it in how I had drawb it, but after I posted those up I realized a design flaw I made. From that same drawing, if the internal taper (and thus down and outwards force) starts at . 0281, That force should have an escape lower at aproximately 45* or maybe steeper. Thus, I think the line that is shown at
Here is an atrocity committed against one of your drawings, but the same shift in the hinge line relative to the cavity could be done to any of them.
https://picasaweb.google.com/lh/phot...eat=directlink
I suspect actual force would be much more vertical than the red line I drew, but it was too late to fix that.
The second individual drawing with the crimp groove as pivot point might be altered by moving the grease groove upward to function as the pivot and keeping the crimp ring where it is. That might be my favorite of them. It has more mass in the petals, which could make a good varmint bomb type effect at very high velocity on soft things.
P.S. Love the line about fruitcake. Maybe we could add UHMW rod or similar to the list. it could be cut square with a razor knife guillotine jig.
I really hope your job lasts long enough for you to make one of these. This would be a blast to develop. I think it would work better with a harder alloy.