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Whenever I setup my pen in the pen holder, I do it the following way:
1. Set pen holder in "pen down" position, let's say at 55%
2. Put pen in pen holder so that it rests on the paper
3. Fasten the screw
Now, in theory this should mean that I can now draw without problems. However, the pen usually "misses" the paper in the middle of the drawing area, i.e. it doesn't go all the way down to the paper. I have to lower the "pen down" position with an additional 6-7% to make sure the pen doesn't miss any parts. This isn't a big problem, but it makes it difficult to get a light touch with my thinnest pens, since they have to be pressed down quite firmly.
Does anyone else have this problem? Or is it just the only way to do it? I'm quite sure my drawing work area is level and even, and I can't see any obvious malfunctioning in the machine.