Since we have some talk about the BP's going on.
I found these links looks like the same stuff in BTM.
lots more pictures.

Breakpoints and Drawing Lines on the Lane (Part 1)    
http://www.bowl4fun.com/ron/tip17.htm

Breakpoints and Drawing Lines on the Lane (Part 2)    
http://www.bowl4fun.com/ron/tip18.htm

Breakpoints and Drawing Lines on the Lane (Part 3)    
http://www.bowl4fun.com/ron/tip19.htm