I think I said the following before, but I don't seem to be able to find the comment :-(

> Just one question about the rolling back @ModCheck, I can keep the my new version ModCheckValidator (just changing back the mod11 behavior) or do you want go all the away back.

I think the changes to _ModCheckValidator_ are fine. _ModUtils_ should just do the mod10/11 algorithm and leave the rest to the caller

> And yes I would like to contribute with the HV-809.

Awesome