Oh...the dreaded quarter-inch, eh? I've yet another masking tape quick fix for that one! Grab a roll of tape and a sharp razor blade. Make two slices about two inches apart from each other and through several layers of tape. Grab a quilting ruler that you know has an exact quarter-inch measure on it. Raise the presser foot and needle, then put the ruler under the needle area with the quarter-inch bit facing off to your right. Let the needle of your machine lower until it touches that line. Make sure it's nice and straight from front to back, then pull off that fat bit of masking tape and stick it right along the edge of that ruler. This should give you a nice plump "bumper" that will help tame the fabric wander problem. There are other products out there that work, but this one comes straight from Masking Tape Queen Leslee...Ta-Dah!!!!
PS: I'm in Southern California :D You could probably tell!