I added nothing. It built perfect. The reciever is placed right in front of the servos in between the 2 half holes and held with a zip tie. The battery is wraped in super thick foam and wedged between tank and receiver in that open space above the landing gear and when I put the canopy back on it holds it in place. It isnt a problem because my other SE is the same and it has been flying for a year. The battery has never shifted.
And for the vertical, I need to put a 13 size prop on, which I havnt done yet. But it does go up pretty nice with the 12 on it.
Im sure you saw mine here
http://www.rcuniverse.com/forum/Sig_...2861097/tm.htm