In our fourth and final edition of Financial modelling Insights for 2015, we begin by introducing our new virtual grid solution vGrid which provides RiskAgility FM users with fast cost efficient on-demand access to secure and scalable cloud-based grid resource. In the second article we introduce Towers Watson DataValidator, a tool that enables insurers to validate, cleanse and transform data, efficiently preparing it for use in financial modelling and reporting. We highlight the benefits of this product through a case study featuring Guardian Financial Services where the product helped to consolidate and improve existing data processes. The third and final article closes out this edition with a tutorial on RiskAgility FM Input Manager, a tool which helps manage assumptions when modelling in RiskAgility FM.