Creating an icon set is always a challenging project, since you have to synthetize an activity or a function into a simple graphic.
Consider also that in case of a set of multiples style and consistency become an issue, in this case I also had to consider that fact that this set had to integrate with a larger group of icons that were already in use.
This preliminary layout shows the existing icons and the proposed new ones, you will note also some alternatives that are greyed out since they were earlier versions that were ruled out from the final lineup.
