I'm finished experimenting and like the results. Maybe this will save someone some work and money if they get some of this string material.
I made one up with 18 strands of x-99. Using .026 HALO. The 18 strand is plenty of string for safety and durability. I have shot it daily for two weeks and it's working great. On a whim I replaced the serving with .030 HALO for two reasons. To possibly make it a little easier on my third finger on a hot day with a thin glove and to make it roll off the fingers a little smoother.
It's a very small adjustment, but I like to experiment. The nock fit is still good, a tad snugger and will fit everything except maybe classic nocks. (.030 HALO has some flattening properties and can fit a wide range).
There is a slightly thicker feel and shoots fine. For some reason it's quieter with the thicker serving. I don't know if there is any truth the the slightly thicker string coming off the fingers better but I do think it's easier on fingers. Oh and it does not creep at all! Very quiet string.
My bow is 61lb@30" The string I have settled on is a two bundle, 18 strands of BCYX-99, back twisted, 2 woolly whispers. I plan to use this recipe on all my bows.
Tedd