If a sketch has a variety of circles in it rather than points, can the Sketch Driven Pattern use the circle centers to pattern the desired feature rather than forcing me to manually go add points to the centers of those circles that will then be used for the pattern?  Alternatively, is there a method to automatically place points at circle centers in a sketch?  This would save a lot of time for sketches pulled from convert entities, for example, where a ton of circles get pulled into a single sketch at 'random' locations.