Hi! The first, I am from Spain, so forgive my gramatical errors. I will try to do my best.
Knots are a nighmare for me, so I start this topic for people like me (knots haters).
Building the weapon, you can see the rope has got 3 knots. 2 are easy to resolve, but the third can be problematic. It is a hangman’s knot (in Spain is their name).
This is the photo that has helped me the most: