The process for creating a custom assessment is not intuitive. Namely, it's tough to figure out how to (1) create a custom library, (2) publish that library, and (3) select that library for an assessment. The only help page available is how to create the custom library but not to publish it or assess against it. The whole process needs (a) to be more intuitive in the tool, (b) more help documentation, and/or (c) both of these things.