I have vast experience in sewing garments and have made a few simple lap quilts. I did a test assemle of the tumbling block pattern and my only problem is how and which direction to press the seams. I am using Sara Nephew's 60 degree triangle and pattern that came with it. The seams in my test ended up in all different directions and were bulky. It is not a matter of pressing to the dark fabric with this quilt. I need help.