I bought a Custom 74 recently, and it was very dry attempting to write on Rhodia paper with Iroshizuku ink. I took it apart, widened the nib tines until I could see light all the way to the tip, made sure that the tines were aligned and tried again.
Now the pen writes quite well, when it writes. Unfortunately, it does occasionally hard-start on Rhodia paper, especially on upstrokes and side-strokes.
As far as I can tell, it does not have baby's bottom, and the tines are well aligned. I don't want to go to micro mesh if it doesn't need it.
When I write on lousy copier paper, it's fine.
I'm at my wit's end with this nib. The pen seems perfectly wet so I don't think it's a feed issue. What else could cause this behaviour?