I have a question. I have always been meticulous (maybe obsessive is a better word) about tying off the threads on anything I make. Last year I was fortunate to acquire a Bernina 730. It has a knotting button and a button to cut the thread, but I can't quite trust them to really secure the threads. Most of the time I end up knotting them myself. So my question is: does anyone else feel this way, or do you just use these features and not worry about it?