It expands the first conversation for an email conversation. This change in default settings (Gmail by default expands the latest message) is very painful! I un-installed it after 1 hour of usage...
Having Symmetry and exact shape is more of an optimization issue. Ansys numerical simulation tools are not really needed for feasibility check. Hand calculations are sufficient, mostly taken care of in the alpha design document. However, the issue of having sufficient space to store steam is somewhat unclear and needs some brainstorming..