Thanks for the reply. I guess since this was my first post it took a few days for the moderators to post my question on the forum. While I was waiting I e-mailed Airtronics and got a quick reply from them. They told me as you already know that the receiver will work with a unregulated 2s lipo, that at the time the manual was writen they were still testing the receiver at the higher voltage.
Thanks again for the reply Teufel.