I find when you make a 8 strand D97 you need to shorten up alittle.But a 12 strand D97 I make them just like a B50.A 12 strand D97 is strong enough for upto a 100# bow.A 12 strand with .024 Halo comes out to a good diameter for most nocks,depending on which nocks you plan to use.I use the same peg and measurement on B50 and 12 strand D97 on where I start to twist up a string.If I go down to 8 strand D97 I'll start with 1/2" to 3/4" shorter before I start to twist.This is what works for me,you may have to try some for yourself.