Paul,
That's a good suggestion! Mike Turber has the ability to add serrations to plain-edge knives, so that would work good! As for the groove on the clip side of the C15, I think it looks more like a "ramp". I have three G-10 combo-edge C-15's and one aluminum plain-edge, and all of them have the ramp. The non-clip side has a half-circle cut-out in the handle that sits where the Spydie hole in the blade is. There were left-hand variations made of the C15, and obviously, everything would be backwards from the above. I would like to see an aluminum-handled variation just to have something different. Titanium would be nice, too. After all, the "main man" (Bob T) makes knife handles out of Ti.
Chad