I was able to borrow a large 50 gallon holding tank from a local A&P to store all the fuel I needed to calibrate the fuel flow testing. Apparently, I wired the main tank sensors backward so I had to fix the wiring on those two. This took some time but everything worked out well in the end. The float sensors seem to need some wiggling (wing rocking) to get them to read consistiently. Good thing the plane will moving the fuel some during flight.