Welcome aboard -- you didn't mention what techniques you are using for the Geese units. There are many ways to do it. Here's a (long) video that explains some of the options.
https://www.youtube.com/watch?v=PJT26kylpMQ
In general, I do a cut/sew large and trim down technique which can be a bit hard to explain -- typically with Geese it means I have my large triangle sized correctly and that the two smaller side ones are a bit larger than designed.
I do find that I make "correct" geese quite well using the rectangle and two squares method, where you draw lines on the diagonal of the squares, sew, and then trim off the excess.
There are also ways to make multiples at a time (2-4) -- some people swear by them but I typically go 1 at a time.