Recently I've come across one article which I believe you might find useful. Someone might take a steaming dump all over it, however it clarified some of my questions. 
<a href="http://blog.holy-infants.bolton.sch.uk/blog/2017/12/20/get-hold-of-help-in-a-great-report-out-of/" / rel="nofollow">http://blog.holy-infants.bolton.sch.uk/blog/2017/12/20/get-hold-of-help-in-a-great-report-out-of/</a>