I have a Viking Rose and my quarter inch foot drives me crazy. It's just as wide as the feed dogs and the fabric tries to go in between the teeth. I started using the "B" foot and adjust the needle position to 1/4" from the right edge and it's great now. About the tension, I have to adjust the bobbin tension every time I turn on the machine even though it's supposed to be automatic. Otherwise my fabric starts to pucker.