Since I've been using the "no waste method" my geese have been flying pretty well.
Try different methods until you find one that you like.
Deb Tucker has a nice video on Youtube with similar method but you have to buy
her ruler too.
I just bought the "Fit to be Geese" ruler but haven't used it yet.
Sounds like a nice ruler for squaring FG.
Oops. Forgot to post the link.
http://www.patchpieces.com/files/flyinggeese.pdf