I am currently building a rocket that is using 2 small tanks near the capsule to feed my lander rockets.. they will have no rockets on them.. does the fuel lines need to connect on a certain area of the tank, ie, Top or bottom (assuming if Gravity plays a part in fuel tank dispersal) and if i am connect them right, how can I get an indication that the fuel is being used? I know if a rocket is attached, i can see the fuel consumption. Currently, I plan on having my tank hoses at the bottom of the reserve tank. Rob/Dekayy