Thanks to all who helped - it never ceases to amaze me how many people care about literally every aspect of fountain pen use. FPN people are awesome!!
I have a converter and I will be using that from now on, plus refilling cartridges. I don't think this is worth it. (Update: except on a new preppy, using a sample, for one time, if you have the equipment already, which I have. I would never ever do this on a pricey pen. When I first posted about this elsewhere owners of pricey pens said that & I didn't understand what they were talking about. Now I do.)
I did try the silicone grease, since I have lots of it, why not? And I'm not sorry I bought the O-rings. Even if one uses the converter or the cartridge, it can't hurt to tighten the seal further. In fact, I suppose the same is true of the silicone grease....
But I really don't get why this matters to the subject. Like I said, the ink from a converter/cartridge flows directly into the teeny tube-let. The ink from the barrel flows freely into the whole "thingy" - and floods the threads eventually, no matter how much grease you put on them....doesn't it? Isn't the free flow of ink the problem?
As to whether it's caused by the difference of inks, to a degree, yes. But the non-flooded (the fine point) was showing signs of flooding. The ink wasn't plopping out but the threads were showing signs of being flooded.
Question: does adding water degrade/dilute the color of the ink?
Edited by Dianamoon, 28 May 2016 - 12:11.