Can I suggest you take a look at Matthew Wood's writings on Agrimony. You can find themhttp://www.naturasophia.com/Agrimony.html
Brigitte has also written a blog post about agrimony as part of the UK Herbarium blog party onhttp://www.myherbcorner.com/blog/?tag=agrimony
I don't use agrimony a great deal but I make tincture from my plants and the flowers are always popular for flower remedies during workshops.
I hope you find something useful.