Deb Tucker is a great teacher,who has designed several rulers. One is her "Wing Clipper"
I use it all the time when I make flying geese pieces for my quilts. And from a girl whose screen name is "makesgeese"...I should know
I put the link to her you tube video below, but you will have to copy and paste it. While I can make geese I can't make inter net thingies link.
Her web site is: studio 180 designs and the videos are on there as well.
I hope you like Deb as much as I do. Whenever I left one of her classes I always felt I left that class a better piecer than I was when I went in.
http://www.youtube.com/watch?v=F7WQpzknLGg
Oh my word! The link worked! I am sure it wasn't me...must of been the elves behind the screen...
Barbara