The trick I use to minimize the pulling at a point, where the bobbin thread seems to come up to the top and the top thread is more of an arc rather than a sharp point, is to stop in the needle down position. After I've done that I manually turn the wheel just a tad to make sure the needle is all the way down and has picked up the bobbin thread. The needle will start to come up just a smidgen. Once I have done that I turn my work and like Jan said make sure everything is flat and lined up and then put the presser foot down and slowly begin stitching. I think the pulled points are caused in part by the needle not fully engaging the bobbin thread until after the pivot and you're sewing in the new direction. It is like it is trying to catch up with you.