Hey George,
I can understand that, there are 100's of recipes on this site!
To answer your question, there are no additives or preservatives in out paste, and it is also gluten and dairy free. There isn't any vinegar in it either. We won a great taste gold award for it and we also got voted top 10 small producer at the Palmer and Harvey Pro Expo, so it's done pretty well! Hopefully you can try it sometime.
We haven't any direct knowledge of BIR style techniques, the paste recipe has come from the roots of the family tree, India and East African influences - my mum is the guru cook (I am still merely the humble student), so i will get her to add some of her techniques to the forum soon!
Jamie