I have had a couple folks ask about instructions for making 50 cal BMG pens with the wood bullets. Heck I know there where several treads but I sure can't find them------
This is the file my kit is based on. http://content.penturners.org/articles/2007/50BMG.pdf
I woudl say just do the same thing except you have a turned wood bullet instead of a metal one. adjusting for the nib woudl be up to you as well. for the most part this means the lower tube is going to set deeper into the wood than his measurment. Be careful not to drill through the tip of your wood bullet though.