With my experience making this rope, I found that doing an 8 strand braid is better than the four strand braid. All you have to do is follow the directions for the four strand, but use 4 pieces of rope and use two strands for each movement. I found it makes a better rope.
I've made rope out of 1/2 inch manila and 3/8 manila.
If I had to do it again I would buy from here
It's the cheapest I've seen.