Three strands of 21g gut soaked, twisted, dried and then glued them together with Aleene's Tacky Glue, to prevent untwisting. I used this glue because of its flex.
I realized that after the strings dried out they would separate from each-other.
The end result is a string width of 15g even though the surface area is = to that of a 16g.
I will continue to post pics and results and feel free to recommend other glues and methodologies.