so I just bought a new metro my first pen above 10$ and I wanted a Ink that is somewhat water resistant since noodler's cost about twice the pen here where I live I used cheap Indian fountain pens couple of wality 69T and camlin 47 series the nib on pilot was perfect it was sharp and hint of feedback like pencil but here's what my bad luck did for me pen doesn't hold much Ink maybe I don't know how to fill it but it only writes about 3 pages ( A4 size simple copy paper ) and I put the pen away for 3 days after I start to write it has such a saturated line almost seems black on paper but after half a page it gets significantly lighter in color more of pastle blue with a hint of black TL,DR - help me with Ink saturation problem , I want consistent Ink saturation , and refilling pilot cartridges with Ink via syringe is a good idea or not ? wouldn't barrle get loose where it attaches with cartridge get loose after long usage ?