Based on the width of the V-Bit, this method calculates that width.
When you offset inward by that distance you'd get the "perfect male". But you need to subtract some to have a little glue cavity and it will also allow for a very tight fit with no gaps. Sharp corners seems to work better when creating the offset.
Please check it out and let me know if you see any errors in my logic - thanks -Scott
Please feel free to DM me for discussion