Leak in Parker 45 Flighter - fixable?

[aremesal]

I have a Parker 45 Flighter, the first model 1964. It has a small leak but I'm unable to locate or fix it...

It doesn't leak while in use, I can use it for hours and no problem. But, let it sit horizontally for some time and it's needed to clean before use.

The leak is always localized just over the nib cover, all around the section border, maybe 2mm thick - see photo #1, but difficult to see.

I've disassembled it, cleaned, etc. I've tried with different inks from different brands, same behavior.

I'm not sure if the leak is in the union between the nib cover and section, or it's between the nib cover and the nib, because I can see "a lot" of ink just in between nib and cover - see photo #2

I'd like to fix it. I know it's a cheap pen, but I love how it writes - I don't know if some owner before me grinded the nib or if it's the standard Parker nib, but it's like a smooth fine stub and I'd like to be able to use it as EDC instead of just "desktop pen".