PP the flying geese will be quick and perfect. Lightly spray the shapes as you are working with diagonals and PP will help to make sure they are all the same and starch will control stretch. Centre will be done first the one triangle each side one at a time. Just make sure the centre point is 1/4" from the top edge. If it is not adjust and keep the adjustment.
Go for it it's easy after the first one and beautiful geese.
Ps I didn't give instructions as I don't know the method of paper piecing you have.