To possibly compound
  the problem: I have a two inch al tube in my gas tank to seal off the
  gas from the aileron tube.. a dandy capacitor.. can we spell SPARKS.
  BOOM! is next. 

Earl,

 

As long as you are already wearing Nomex,

 

I assume from the above that you are implying that fuel vapors in your gas tank would be ignited by a capacitive discharge from the aluminum tube. I wouldn't be too concerned about this. Assuming you are using gasoline, there isn't enough air in the tank head space to support combustion under "reasonable" flight conditions. If you are flying on diesel or jet fuel and at high altitude, it is a different story.

 

With either fuel, a spark generated from this capcitance will most likely propagate between the surface of the fuel and a close, conductive component such as the fuel filler. Electricaly connect all such components, including the tube, and the potential is removed.

 

Rob