Made a few compasses...if it is poofing in the middle, the wedges are too fat (full, large) towards the inner point. If it is wavy on the outer edges, the wedge is to large on the outside edge.
If your are not paper piecing it, it still might help to have a paper 'template' of the wedge section that you can lay the cloth section back on and see if it is staying within the angle dimension.
Now, if you are paper piecing....
I find that a drawn full circle template is better them a printed sectional template. If you only print sections, the overall tolerance allowance will build up to a nasty problem when sewn together.
If you can only get sections as your template.....print them out and put the circle together to make sure the angle wedge is accurate.
Considering the bias issue on compass points, even a freezer paper template to hold the wedge in shape helps (you sew just to the side of the template)
Hope this helps.
Mary S
