Step 1- Put the rope through the rear hole, then through the front one:
Step 2- Criss cross the other side of the rope through the front hole:
Step 3- Pull the rope through the front hole, leaving a little bit arcing from the rear to the front, and keeping the ends of the rope even:
Srep 4- Cross the rope in FRONT of the arcing bit, putting the right one OVER the left, and then pull the left rope through to form a loop, then pull the rope tight:
Step 5- Now, cross the rope BEHIND the arcing bit, putting the right one UNDER the left, and then pull the left rope through to form a loop, and pull the rope tight:
Step 6- Continue this process all the way to the rear of the handle, making sure to keep the knots tight and fairly flat, and close to each other:
The pattern should look the same along the full length of the handle; if it doesn't, just undo it to a good point, and start over. The BB9 took me about an hour or so to do, what with false starts and glitches.
When I reached the end of the handle, I just sort of fussed with the rope until I tied it off adequately. I know that's not a technical explanation, but I just played with it until I was satisfied.
Step 7- After tying off the the rope by the handle, I took the ends and looped them like so:
Then, I brought the rope through the loop, and pulled the loop tight [also see photo 1 above]. This creates a lanyard so you won't drop the knife, plus leaves a little extra rope should you need it [I don't know what you'd do with it, but it's there if you want it].
When all is said and done, use a lighter or matches to close off the ends of the rope- it's synthetic, and melts down a bit so it won't fray.
And realize this- the knot I used is just a plain knot, the simplest one there is; it just looks fancy because of the repeating pattern. I don't know the first thing about knot tying, and this was the only thing I tried that worked out.
