I only mix it in the loop ends,I use B50 for padding loop ends.I never use it in the bundles when twisting up a string,it would be just dead weight because the stronger D97 will be carrying the load.Been padding my loop ends with B50 for a few years.On my 8 strand D97 I'll add 4 strands B50 per bundle,making a total of 16 strands in the loop ends.It fills the string grooves better which I feel helps to quieten a string.I have been using 8 strands D97 on my bows 58# and under,I feel it is quieter then a 12 strand D97.