My first post on this board was about how I do flying geese. I LOVE them. Must be the way I do it. I didn't have a camera at that time so someone else came up with them in
http://www.patchpieces.com/files/flyinggeese.pdf
My original post is entitles Flying Geese Discussion. Take a look. No fancy rulers. Very little math. And I get perfect results every time - and that's a Lot of Times!