First you have to really identify the source of the scratchiness.
Writing experience has 4 variables; pen, ink, paper, writer.
- pen. This is what you are looking at. But you are only looking at part of this variable. Here are some of the sub-variables: tip alignment, tipping shape/profile, smoothness of the tipping, ink flow (this is cross-dependent on the ink).
I found that about 80% of my scratchy pens were fixed by aligning the nib. You need a decent 10x loupe to see this. And sometimes the tips will look aligned but writing test will tell you that they are not aligned. Note that you MUST look at the tip of the nib NOT head on down the nib, but at an angle as if you were looking along the surface of the paper, so that you can see the alignment of the nib on the paper.
If the tip profile is not like a ball, then you will probalby get scratchiness from the corners. And the sharper the corners, the more scratchy.
A dry pen will feel scratchier than a wet pen, as there is little ink/lubricant to lubricate the nib on the paper.
- ink. What ink are you using? Some inks provide more lubrication for the nib than others. Some inks are dryer than others.
A dry ink in a dry pen = a really dry writer.
- paper. Paper can make a big difference. The less smooth the paper, the rougher/scratchier it will feel to a finer nib.
I have papers that I can't stand to write on with a XF or F nib, but is perfectly fine with a M or wider nib.
- writer. The harder you press the pen, the more friction you create between the nib and the paper, and that can = scratchy.
I found that some of my Lamy nibs were a bit dry and scratchy, and had to be adjusted to make them write wetter. The normal method of lifting the wings of the nib don't work with the flat Lamy nib. What I had to do was to CAREFULLY lift the tip of the nib, just a little bit, test, then lift again, then repeat until you get the ink flow you want. Caution, if you lift the tines too much you will stop the ink flow. So you have to find the perfect balance.