Sharon Schamber has a GREAT technique that uses Elmer's School Glue. All you do is apply a small drop of the glue to the matched seams, press with your iron (I count to 3) and you end up with a matched seam - even angles. She sells tips for the Elmer's bottles - I ordered them. Haven't made many quilts (I am a real newbie) but I can say the last one I made wasn't ripped because my seams did not match. This method really works well. Good luck!