But the stock Cessna setup would never create
this condition!

That statement is laughable. All it takes is a stuck gauge.

In this case the stuck gauge was caused (I'm of course Monday morning
quarterbacking) by the overpressure in the fuel tank, which was caused
by the aux fuel system. HOWEVER, there are many other sources of stuck
gauges, and to say that "it will never fail" is ludicrous.

Aviation systems are supposed to be =robust=, which means fault
tolerant. Even =many= fault tolerant.

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.