On the "speed" runs we were using an **** Lipo. But almost all of my "feel" testing was using a 3800 IB pack. I'm a racer so that's what I was wanting to test for. We did use the Lipos a lot to try and get it into a thermal shutdown but weren't succesful.
As far as a release date, I really can't say. I know what stage they were in as far as in the building proccess. Last I heard they were working on the case molds.
I am trying to talk Tekin out of a proto for our large local race so I can snap some photos of it and show how well it does. There is supposed to be some video of our "speed" runs. You will probably have to edit out my laughter!