Screw Top Jar - Designspark Thread

Designspark Mechanical doesn't have any direct way to form a thread and I started looking at how this could be done. After watching this YouTube video http://youtu.be/ZXgMY3-hlgs the author suggested using the helix cut feature and pointed me to this http://youtu.be/jyLPuvF_MVg video. I found this additional video, http://youtu.be/p9gYEdyLFIA which uses some different techniques. I settled on the "cut" and "add" functions and then remove the excess thread (on the base) using Pull and cut. From this I made this thing as a test - I wanted a thread that could be easily printed (and function) - this is the 1/2 round version