Moving forward with plans to get a CS re-production raw steel tank painted up. Have tried a homemade setup to test for any leaks....learned from a YouTube video on a home-build aircraft fuel tank maker showing to just attach a nitrile glove around the filler opening using elastic bands. Then to blow into an outlet nozzle until the glove inflates and leave it to sit overnight. Any significant lose in glove inflation not accounted by temp changes indicates a leak and to then proceed with soapy water spraying on seams/fixtures etc. Well, doing this gave glove deflation in only a matter of 15-25 minutes. Tried double wrapping the glove with elastics but no improvement. Went hunting with soapy water but could not see any obvious leaks. Any other tips or does it need to go a a radiator type shop for more professional checking?