How to extend a screw thread?

 From:  BurrMan
11740.11 In reply to 11740.10 
Here is the file. You'll have to let me know if you cant access it. Not a google drive user....

https://drive.google.com/file/d/1DddrzDzhtq9FL7keVJE2YqL7vaNyHouX/view?usp=sharing