CellProfiler ClassifyObjects threshold based on STD

Hi everybody,

I am trying to use CellProfiler to classify cells in my images, and would like to classify based on the AreaShape>FormFactor. I was wondering if anybody has found a way to make the lower threshold value equal to 2 standard deviations from the mean value of FormFactor for all objects in the image, rather than setting the lower threshold to be an arbitrary value determined by the experimenter? Currently I am using 2 evenly spaced bins and my only option to set the threshold values is to type in a number, but it would be great if I could have the pipeline automatically use the STD determined in the MeasureObjectSizeShape module to set the threshold.