Shilpa Shetty is redoing some calculations in her head these days. The 38-year-old super fit star wanted to do a full blown action movie with Bipasha Basu four years back. But Shilpa was not sure back then if the time was right for a female-centric action drama. But now the times have changed. More and more movie makers want to experiment in terms of the subject matter and more scripts are being written by keeping heroines in mind.