Rob Sewell points out an addition to dbachecks:
This will show you
- the UniqueTag which will enable you to run only that check if you wish
- AllTags which shows which tags will include that check
- Config will show you which configuration items can be set for this check
The trace flag checks require the app.sqlinstance configuration which is the list of SQL instances that the checks will run against. You can also specify the instances as a parameter for Invoke-DbCheck as well.
Click through for an example.