CTM is Autodesk's threat modeling methodology enabling development teams to perform threat modeling with minimal initial security knowledge and lesser dependency on security experts. It is an evolutionary, dynamic methodology that should mesh well with teams using Agile and evolving system architectures. All manner of contributions are welcome. The methodology is still relatively young, and emphasis has been placed on simplicity, return-on-investment and building a developer-friendly workflow. We are looking for contributions on the security principles, secure development checklist, and community support - as well as win or less-successful cases, improvement and modification suggestions.