I went online and downloaded the different methods for making FG.
I really don't like the QID ruler. It is easier for me to use a regular ruler and cut the desired sized pieces.
I have 4 different ways to make the FG. If I had a whale of a lot to do I might consider using something like triangles/FG on a roll paper piecing.
Do what you like and feel comfortable doing. One friend makes hers one at a time using the rectangle and 2 small squares method ... and hers always look great.
ali