Thank you to all who took the time to respond. I can analyze forever and never start the project.
Betty, I have the triangulations software and am waiting on lightweight paper. My problem so far has been the goose triangle sliding around. But I think it could work. I have also cut the 3 triangles with the Easy and Companion angles, which seems to work fine except at the point. I am thinking I would use the two methods together if the new paper isn't slippery.
Maybe pressing open would be less distortion if I had paper behind it. But at least I know that experienced quilters are pressing to the light.
hugs,
charlotte