Check out the kitesurf forum on yahoo!
Those batten reinforced tips are used by North on its kites. The idea of battens i saw first on the internet as a solution for the tips of the 5-strut Wipika airblast 8.4. Wipika solved it by adding two inflatable struts. The battens seem nicer!
I think you'll be able to read more there. The forum has a search option.
Another option is posting your question there. I'm sure you'll get a lot of response.