Something I learned from Sally Collins is that when you are sewing those points be sure to sew a thread or two towards the outside of the point so you do not cut them off. Jan Krentz says the same thing. I don't have a block here at office to show you. If I think of it at home, will show you. Also, when you are done sewing, do you size them down with the diagonal of the ruler? Then just trim, another point when trimming from Jinny Beyer and the above, is that you set your ruler on top of square and be sure the line on ruler is inside the edge so you don't trim to small and you get an accurate cut and block in the end. These are simple little things that made a large difference in my piecing. Just some suggestions for you.