In addition to the instructions on making the knife I will include an explanation on how I replicate the knife design. (I ended up making 4 of the same ones)
These steps are not exhaustive and assume the maker has experience with some basic metal working tools.
-Angle Grinder (with different grit flap disks)
-Lawn Mower Blade
Step 1: Safety
In this case it would include:
Respirator (remember grinding disks are putting many nasty things in the air)
Gloves (although not necessary and not for use when working at a forge I like to use a good pair of leather gloves to lessen the vibrations when I am working with grinders.)
Step 2: Making/Tracing the pattern
To get an idea of what kind of designs work I would suggest first cutting different patterns out of cardboard and seeing how they fit in your hand. Then when you have prototype you like then you can transfer this by simply laying your template on the lawnmower blade and moving it until it fits. Now just trace your template with a sharpie and you are set to cut it.