Crikey. This is what happens when my internet connection gets dropped for a day.
Polanova, for me this pen--and other flexible-nibbed pens--are very useful for drawing; I do primarily pen-and-ink illustration for a living. However, I didn't mean that I use ONLY flex pens for drawing--I also use brush pens, rigid nibs, semi-flex, fude, and even knives (when I do sgraffito). It all depends on how I want the finished drawing to look; if I want it to convey a particular mood or time period, for instance. I would likely not use the WoodGlass for sketching, because the nib is more suited to making slower, more controlled marks. I would likely use a semi-flex, tipped nib along with a fude or brush pen for sketches (specifically, I carry 3 Pelikan M215s in my field set: one with a rigid Medium nib, and 2 with custom Richard Binder nibs: an xFine/Xflex, and a Condor fude-style nib).
As for nib/pen direction, I turn my hand for horizontal strokes; otherwise, I just rotate the page. In the sample I posted, I tried to show the type of line the Desiderata pens can make when used for drawing; most of the samples here on FPN tend to focus on writing or calligraphy, and when an artist is researching a particular pen, it would be helpful for them to have an example of drawing as well. They can decide for themselves if they are interested in working in that style. I don't believe there's any one perfect "artist's pen"--far from it; I think an artist needs as many tools as it takes to make as many types of marks as they want.
TeaHive, the clear tank does indeed extend into the wooden end--I stuck a skinny knitting needle down in it to find out. It holds 2.4 ml, enough for a whole ink sample!
Pictogramax--Thanks so much. What can I say; your drawing is fantastic, and illustrates perfectly how different types of marks work beautifully together in one drawing.