Making special screws out of common screws - video

Making special screws out of common screws. By Steve Jordan. 7:32 video:

https://www.youtube.com/watch?v=b1Xu0--P184

I do a lot of thread extending on screws and bolts when I don't have one that suits me. But I really can't say it saves any time or money. It is more of I need it now rather than drive to the store while I am right in the middle of doing something.