on this setup http://www2.towerhobbies.com/cgi-bin...I=LXGAG3**&P=7 it says it comes with a battery box..does it fit in that compartmant on the tornado xp in place of the battery holder fine ,and how many batterys does it hold...aslo can a stock redcat servo plug in this futaba reciever with the stock plug coming from the servo? thanks