To my knowledge you CAN NOT use a walking foot on any machine for FMQ....you need the darning/free motion foot. The trick is to use your walking foot for your straight line quilting or SID first to keep your quilt sandwich in place and then use the FMQ foot. Most of us lower our feed dogs and some have success with leaving them up. It is just one of those processes that take time in learning. Make yourself a bunch of practice quilt sandwiches and practice away. With using a frame because your sandwich is already taut you wouldn't necessarily need to use your walking foot to keep your layers in place. Although I will say there are far more skilled quilters that can on their regular machines FMQ without the need for the walking foot in the beginning. Hopefully I'm explaining this right if not someone please jump in here and help me out with explaining this. :?