Josh you might like to read some Dhanurveda fragments.
http://www.atarn.org/india/dhanurveda_eng.htmThere are more but I had to import a book from India to get some in translation and most of the Dhanurvedic writings were lost in antiquity.
Although it is about the art of the bow some is relevant to other martial arts and qi gong. Some of the postures from my book of translations are similar to kung fu or taiji.
http://www.amazon.com/Dhanurveda-Milita ... 8187710497 (good translations and illistrations of original texts but also some out there theories about flying weapons in by the good Dr, still it is a unique source and a good compilation of small parts of relivant texts as well as larger texts in complete form. It is also fully referenced and with the sanskrit in places with the traslations).
I am only starting to scratch the surface with my enquirers as I have only been at it for a few months and cant read sanskrit.
I find the roots of Indo-European martial arts fascinating and would love to hear more about your practice of the Vadra and any sources you are drawing on for inspiration and guidance.