you don't need to add too many strands or you reduce performance...a string should be 5 times the strength of the bow plus 10% (or is it 20...been awhile since i read that chapt of Bowyers bible). ex B-50 is rated at about 30lbs i think, so if you are making a string for 60 lb bow, then 5 x 60=300 then 300 divided by 30 lb rating is 10 strands plus the safety margin. 12 strands is what you need for safety, if you add two more just to be safe then you are up to 14, you certainly can but it is two strands you don't needthat will slow down your performance