This site is way too cool.
Can’t believe it’s taken me this long to join in the fun…
Not sure I know how it all works, but I’m sure I’ll find out. 
Glad to hear you like it, Sandra.
Here are some things for you to look into, to help you see how it “all works” 
http://tudiabetes.com/forum/topic/show?id=583967%3ATopic%3A10871