I have restored a pair of nearly identical (structually) third tier pens (Colby and Signet), both have identical feeds and visualated sections, but different nibs. I tried to replace the original nibs with what seem to be good fitting new steel nibs. But when filled with ink (vintage Parker Quick blue-black) they write, but will splat out drops of ink at the slightest provocation. When I replaced the original nibs they do the same thing. I hadn't tried either pen before taking them apart and replacing the ink sacs, so I don't know how they worked before. I used a knockout bloc to remove the nibs, cleaned the nib and section with Rapido-Eze, and think that i replaced them in the same orientation as they had been in before. I", not sure if they are set in as far as they were, but it's as far as I could push them back in again with finger pressure. Actually, to avoid unnecessary mess, the second pen I just tested with with water, but got the same result.
Most of my experience with pens has been turning my own using kits. The kit pen nibs are friction fit, and have an area recessed into the section in which the nibs slide into, not so these. The other main difference is that the feeds I'm familiar with have tiny, almost hairline ink channels, whereas these are nearly 1/16" wide and about half as deep. I haven't had any other vintage nibs off, so don't know what is standard. I was thinking that the new nibs must not fit properly, but they don't fare any worse than the originals that I reinstalled. Does anyone have any ideas? Am I missing something?
Dan