How to work with iLogic? How to create drop down menus of similar vessels with different dimensions (based on capacities)?

I am using Autodesk Inventor 2016. Now i am trying to make pressure vessel with different heads and different dimensions of a vessel by using drop down menu. Please help me.Where can i find best tutorials.

1 Answer
im doing the same thing, only with rules and a lot of ''if then'' funtions and ''component is active''