I've noticed that people are having difficulty with the Scenario Editor; mainly building cards because editing image files is difficult! I've also found the experience to be inconsistent when lining up text and images.
Rivet Wars Card Builder
You can now:
Build your own Secret Mission Cards
Define your own Victory Conditions
Add up to 6 Victory Points
Use one of 16 images to illustrate it
Upload your own images (<3MB PNG Files only 340x300)
Build for own Action Cards
Select a Deviation Roll (including no deviation)
Add one Damage/Attack Roll

By: Tom Hill