ok the problem with the small 4oz fuel tank can be solved with a drip tank that drips in at the same rate being used right? Or would something like a three way valve from an old autococker(Paintball gun) work with a servo attached and have that swich over once the time is right? woud those work with any plane i decide to go with? ive looked at all the designs and they work but all other imput is good and apreciated i am looking for something different