Gents,
here is the best I have seen and yes they do work. plug and play, get the extra board and u can stop the HL cannon shot also. no need to change boards, but if you want you can get a board that is plug and play as well so you can use your existing radio ie Spektrum, Tactic etc
take a look

http://rctanksaustralia.com/shop/<br type="_moz" />