I started with the continuous loop because it looked easier. Made a nice, adjustable jig and made up a couple of strings pretty easily.
Then I decided that I needed an adjustable tillering string and couldn't figure out a good way to do it with the continuous loop style, so I sat down and figured out the Flemish twist style. Made a braided reverse twist loop on one and and then just reverse twisted about 12 inches of the other end for the bowyer's knot. Dead simple once I figured it out.
I even made one of the Flemish jigs with all the nails in it and have discarded it. All you need is a roll of B-50 (or whatever) and a knife!
Now, I've dropped the continuous loop altogether. I LOVE this style of bowstring!! It's worth figuring out the Flemish twist and the bowyer's knot.