I've found the Noodler's pens quite easy to get along with. I just don't seem to have the trouble with them that others talk about. Mine just work. I've put Goulet nibs in a few of them, and it adds a unique quality.
I tried the Goulet nibs in a Jinhao 450 and it did not fit well and did not write well. I wanted to heat set the feet, but it's a plastic feed, so I wasn't going to try that!
The Edison pens are built with a nib that is part of a screw-in unit that consists of feed and nib. Maybe someone braver than I has tried swapping out the nibs in this unit? I don't see how without risking damage.