Make your string kinda reverse wrapped. Don't worry about everyone saying reverse wrap is bad for bow strings, if you do it this way it's fine. The problem with reverse wrap is really reverse wrapping strings that were reverse wrapped to begin with. That will always fail. Anyway, take your plys you are going to make a string with and divide into two bundles. Wax each individual string up and down once with some kind of wax like beeswax. (This is important too). Only once up and down or it will build up and look bad. You don't have to twist the plys that much, but it's not that bad to give it some twist. I use 10# -15# breaking strength linen thread for mine. Eight plys for a 50# string do the job. I even use eight plys for up to 70# bows sometimes. You have to reverse wrap em a bit because if you dont the loop won't hold as good. I mean opposed to just the strings around each other. But you could I guess just twist the plys around each other, I see guys do it, I just have tried it and have had better results giving it a bit of a reverse wrap.
HERES THE PART THATS MAKING IT COME UNDONE
Take the string after the plys are wrapped around each other a bit, and make a loop with about a inch and a half or so extra left over after the loop. Unwrap the two plys right below the loop on the part that is the main string and hold somehow, I use my big toe, (
), and also unwrap the little bit of extra ply hanging off after the loop. Now look at the direction the plys are wrapped around each other. This is what I'm talking about. What you have to do is to unwrap the extra ply that is the main string about a inch and a half, and the extra plys left over from the loop, unwrap em back to the 2 plays they were before, and wrap one play from the hanging extra around the main string play that is unwrapped. And then the other. But you wrap them in the OPPOSITE DIRECTION that the plys are wrapped around each other. This makes a strong loop, as it basically makes the string reverse wrapped around it's self when you wrap em back up, form the tension of where you initially reverse wrapped (or slightly twsited, whatever,
). Your wrapping the plys around each other in the direction they were twisted, wo they twist back in the opposite direction and hold well. If you wrap it the same direction as the plys are twisted in will come undone automatically. I can see in your photo that you wrapped it in the same direction as your plys are twisted. All you have to do to make it stay is wrap em in the opposite direction. Was that confusing? It sounded so to me when typing it,... lol