Guten Tag, meine Freunde! This Instructable assumes that you know the basics of making a paracord watch. Its purpose is to show how I worked past a few glitches in the process, so mistakes don't have to be repeated. Enjoy.
Step 1: DISASSEMBLE!
Remove the stock watchband. Most watches should have this really neat spring thingy that you can press shorter to remove the rods holding the band.
Step 2: Modify Your Paracord
A problem I ran into was that paracord is too thick to fit in the watchband-rod system. To make it thinner, remove the seven strands from the middle. You now have "flat" paracord.
Step 3: Make the Band
Now slide the paracord in as shown and find a good size for your wrist. Keep min mind that the finished band will be thicker than it is now. Remember to test-fit the band after every step!
Step 4: Secure
First, tie an overhand knot on the strands as shown to secure it. Then, carefully, tuck them under the spring-rod thingy as shown.
Step 5: Finishing Up
Now use more paracord (not flat) to finish the band. Simple.
Step 6: Rollercoaster Proof!
I regularly ride rollercoasters, and I am paranoid of losing stuff on them, even though it has never happened. Just to be safe, I made this latch from a paper clip, thus making this watch rollercoaster-proof!