Someone at an organization that should definitely know the difference mistook my M20F for a Beechcraft C12 and filled all four tanks with Jet-A.  Luckily their supervisor caught their mistake and found me before I started the engine. My mechanic is coming on Monday to help flush the tanks.  I already called my insurance to start a claim.  What damage is this going to do to the tank or the fuel lines.  Anyone else ever have this happen?  How much is this going to cost?  What am I not thinkin