Hello, I spent some time and made a little research about Freethrow skill correlation to accuracy. For each skill level I used 5 different test subjects in Transfer list. Of course using more players, stats would be more accurate.
http://photosliv.ru/9297.jpgPlease note that:
Always exists a tolerance of 2-3%
All numbers are taken at the end of season, so it is impossible to tell if player increased during that time in FT skill.
In the second box first part of numbers represent made shots and second part attempted - this means that same player is same color - for example first test subject with atrocious FT skill made 14/41 freethrows during this season. You can ignore that box because it is made for me to count easier.
Test subjects remain anonymous.
Legendary skill is usually 20+ so It is impossible to determine if it is 20 or higher skill.
I made a conclusion that profilic FT level is enough for my players. Hope you have something to add and hope this will help you. If anyone willing to make better research using more test subjects, I can sent original excel file.