i wanted to comment that in the 12 years i have been flying my -6a i've noticed many people installing capacitance fuel senders.  i didn't have a choice 15 years ago.  meanwhile i have read so many posts from people having troubles with them.  i have the old float/resistor type, as does my hangar mate.  we both have over 1000+ hrs on our planes and have had no problems.  we installed them, connnected the wire to the guage, done.  the last quarter tank seems to go a bit faster than the first, same as my truck.  the only fuel level problem i've had was from installing low-fuel level switches which melted, despite specs that said they were for fuel usage, and almost popped out of the tank.  but, that ocurred early on, and i realize that i watch the fuel level like a hawk when flying.     kevin  [gadgets are fun when they work right.  debugging isn't.  try fixing intermittent auto pilot/gps glitches for instance]