Tested the fuel tanks a while back and have had the chance to update the page. Both tanks tested well with no leaks other than at the threads of the drain fitting. I carefully used Teflon tape for the test and removed all Teflon after the test. Both tanks were tested to 1 PSI using a home made manometer. A sigh of relief that both had no leaks after spraying soapy water and waiting for 24 hours watching the temp change to calculate the predicted water level change.