I modified my fill port by milling a 1/8" hole right in the middle. Still a pain in the azz to fill from a typical dropper lol. It is easy enough to move though. I also drilled four holes in the chimney for better juice flow. That was a big improvement.
Ultimately, the L2 was/is in my mind an ok atty with not a whole lot going for it over the so many others out there.