FMQ is a dance between moving your hands, how fast the machine is stitching and your tensions. Try to change just ONE thing at a time. Try slowing down your hands, esp on curves. Steady stitch speed is a good target. Not too fast, not too slow. Its a process. Just keep track of what works. Tensions should be changed slowly and not both at once (top and bobbin). If you use a stand alone bobbin winder? Consider a lamp dimmer switch. It looks like an extension cord with a dimmer switch on it. You plug your bobbin winder into it, and it into the wall. Now you control your speed on the dimmer switch and not on the foot pedal. I get a much more consistent bobbin and I think that has helped me ALOT. I would not practice on a quilt first. Invest in a cheater panel or muslin. I made lots of dog beds! have fun and don't forget to BREATHE!