Joe,
Be sure to set the seam allowance on each machine, individually. The biggest problem we have with multiple- machine charity quilts, is getting the corners to match since every machine does a different 1/4" allowance unless it is measured and adjusted. As you know, some 1/4" feet aren't 1/4" either. Calibrating the seam allowance will help make piecing more accurate and not so frustrating. You will truly learn about each machine by using them in a like task. Good luck on your new experience.