After heat setting the Ahab, I think I'm more or less in the same place I was before. The stages of my experience with the Ahab are:
1) Feeder reaching almost to the tip of the nib: flooded in ink. After five minutes, writing was still very wet (see photos above).
2) Moved nib outwards, to make it look like in TSherbs's photo (though feed cannot be pushed further into the section). Pen seems to be a bit drier, but nib moves sidewards when writing, so discarded.
3) Nib more inwards than in point 2. Pen drier than in point 1: writing dries in around one minute and a half and two minutes, depending on the paper. Thin lines when trying to write in copperplate are thick in comparison with the thick lines.
3) After heat setting in more or less the same position as number 3, drying time is roughly the same, maybe a bit shorter (closer to one and a half minutes than to two), and thin lines are slightly thinner, so it seems less ink is coming out of the nib. But now the pen has a tendency to go dry when unused for a couple of hours (though it doesn't take lots of effort to make it write again after shaking it vigorously, blob included).
Should I move the nib around a bit more until I find a better spot before heat setting it again? I suppose the only possibility is making the nib protrude a nit more, but there's not much difference between now and point 2, where it was so outwards that it couldn't be held in place.
If not, I'd try modifying the feeder in some way (though, as I said, I'm trying first anything that won't change the pen permanently). However, how can I know whether the fact that the feeder cannot be inserted further into the section is because it's too long, or too thick? I've been trying to figure out which the answer is, but I haven't been able. If it's its thickness which is preventing it from moving inwards, because the barrel is too narrow, then I'd have to sand it down all around; if it's a narrowing in the part of the section which is closer to the converter, then sanding down the read end of the feeder would work.
Sanding the read end first sounds safer. Or would it damage the pen's performance if that's not the problem?
I remember seeing posts about expanding the feed channel with an x-acto knife, so likely with a cutter and a bit of patience it should be easy.
That was the second of my DIY projects last weekend: heat setting the Ahab, and expanding the feed channel of a Waterman Kutur which dried out after just a couple of hours. I cannot vouch for the result yet, though it looks promising. If the pen isn't dry after two days unused, I'll proclaim it a huge success. If it lasts just 24 hours, then it'll be just great.
Edited by Cassotto, 11 May 2020 - 16:17.