to adjust the timber hitch you take the free dangling end and loosen the twists which go around the string making the loop. you then feed the extra from the actual string through the loop until its as short as you want it then you pull the timber hitch tight again.(if that makes sense) the timber hitch is essentially just the string wrapped over itself, if you look at it you should be able to figure it out. you can leave the timber hitch in it, wont hurt any unless you adjust it alot, or you can put another loop in it if you have enough extra, usually about 7" to make a loop. personally i left the timber hitch in my longbow string, for one to be able to adjust as it stretched, and for another i use it to tiller other bows as its the longest string i have. i just make another string if it gets too worn. good luck, if you still need help ill try to post pics explaining.