Cool. So what's about we clean the current pull request up, meaning 

* Removing the unused comment
* Commenting in the tests
* Removing the obsolete comment
* **But** also reverting @ModCheck to its previous state

Once we have this we can merge it as fix for HV-808. Then we can use [HV-809](https://hibernate.atlassian.net/browse/HV-809) as a follow up issue to create dedicated constraints for MOD 10 and 11.

@victor-rds could you do the cleanup and rebase of this pull request? If you need help just let me know. Also if you are interested in contributing to HV-809, you are more than welcome :-)