Yes would be great, so if you found out something else than let me know.

But I am really sure, because they changed this point not so long ago.
Before it was only possible to upvote 6½ days and only downvotes could be submitted 7 days long, but they changed both to 7 days and I am aware of a discussion to change this back to 6½ days for upvotes, don't know if this is just discussion or if is planed with next hardfork.