Making Nose Cones from a Body Tube

Here's a link from a rocketry forum, one of the better D.I.Y. YouTube rocketry videos:
http://www.youtube.com/watch?v=4-rfazz1Z3c

This is a interesting technique on how to make a nose cone from the end of a body tube. It's very well explained by RocketmanBKK from Thailand.

I tried to make a body tube into a nose cone years ago but didn't get the results that he did!