Well the new tank is installed. I had to cut out the forward U support as well aft backing plate. I was able to slide the tank aft and slowly rotate it out. There was about 1/2 in clearance between the corner of the tank and the bulkhead. I ground down the last of the tabs and cut out some supports out of G10 from McMaster Carr. I put in the new tank and glassed in the new supports. I metered in the fuel to calibrate the direct reading gauge.