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I get that "ewww,she's dragging her fingernails on the blackboard"
feeling when I hear people wanting to mod one of their knives.
However,I am very surprised by much of what they accomplish,
fantastic stuff some do.
Me,I have to stay away from attempting anything like that for
now...Maybe when I get more experience convexing an edge first.

It does sound like a good idea,that extra edge for a ferro rod,
but I have found that a sharp 90 degree edge works fine.
Cutting Barbed Wire,dunno,never tried it,I would use
wire cutters,unless it was an emergency.
(in which case I would borrow a friends knife to cut it)

Good luck and let us know what you do.
Lots of pics are required. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />

The alternative of grinding a sharp 90 degrees section on the blade is the other option I was considering....I did this on my NMFBM and for ferro rod use it works very well. The barbed wire aspect is probably OTT...if you carry a Leatherman the wire cutters are there and able to do the job much easier. However if you go for the Leatherman which has secaturs for clipping foilage instead of pliers...then you don't get this feature. I tend to use this version a fair bit more than the pliers one but do have both...it is just helpful to minimise weight as much as you can if possible...

JYD #75