Ladies ladies ladies! we dont swap for perfection you know!!
If you do want to improve your points then you can do it by making sure your hst is accurate. it has to be square and the right size. the corners need to be trimmed even so the seam is perfectly in the middle of both fabrics. then when you sew two together make sure your corners stay matched. I tack the corners so they can't move and I tack anywhere seams meet. I measure each time I sew hsts together to make sure I have the correct size after joining them. this helps to make sure your seam allowance doesn't make your points off. It is easy to get the hst crooked when sewing too. I trim a bit when needed.
If you take time to prevent then it pays off in keeping your points.
http://www.quiltingboard.com/tutoria...ts-t23252.html
But that said - the swap is more about having something made by the member who sent it to you!! I don't look for perfect points. I look at the beauty my friend made for me!!!