I made a board as instructed by Ron Harris for making Flemish strings. Google it. Worked well for me and it only took a half hour to make the board out of a scrap piece I had laying around. Each notch adds an extra 2" length to the bowstring, so if your bow was 50 inches, you might use the 52" notch to add extra length for the large loops. IMO A little longer is better than a little shorter because you can always put a little extra twist in it to raise your brace height if needed.