Finally got a look at the gas tank on my 1926 1-1/2 M. Tank is original and shiny (under the dirt and grim). Took the filler and drain cap off, and ran a little light compressed air through it. Nothing banging around in it, no detectable air leaks, only the smell of old varnished gas. What would be the best way to flush it out, and preserve the interior and exterior. I am convinced (unless it leaks fluids) that it will not be necessary to remove it. I can picture the pipe threads twisting at the tank if I had to remove them, on or off the engine Thanks!