It does not work and he is misleading viewers . When Sawyer talks about radiation pressure he intentionally omits cone wall ' s pressure which when added to the two flat walls null out any external forces . It was pointed to him by scientist on Newscientist blog several years ago . <| sep |> Love this . Very accurate . <| sep |> Learned a costly lesson before . I didn ' t know this and let them swipe twice . I just let karma deal with them ' coz I did all I can and still didn ' t got payback . Lesson learned the hard way . <| sep |> WTB silver card VeliMatti Savinainen from Finnish League , Tappara . Please contact if you have him . <| sep |> Not directly related , but thank you for this website OP , now I can trust that in the event that I need it I will eventually be able to find a replacement battery for my OP 3 T