Definitely helps thank youThe one thing I do know (suspect)... think I heard Bulldog say it is the X represents the cross center section. Draw a line from each point diagonally to the opposite point (top front to bottom rear) and you will get an X. Not sure about the 3. Those lines will also guide you in getting your shape. Definitely watch the whole vid. I know its almost an hour long but it will go fast and its TOTALLY worth it. After linking it to that post I found myself watching it AGAIN. LOL
Hope that helps.