In the interests of not having duplicate posts, please continue here https://moodle.org/mod/forum/discuss.php?d=365889 - where I have replied in detail and would not wish to lose that - and assume this post / thread is closed.
As a reminder to everyone to follow the rules please: https://moodle.org/mod/page/view.php?id=7080 - 'Post your question in one forum only'.