Recently, I invested in some Koh-l-Noor Radiograph Pens. I do a fair amount of pen and ink work and I've noticed the expense of replacing Microns all the time.
After reading The Technical Pen, I just had to go for it. So, are they worth it? Yes, they are worth it! They are way better than a Micron. The metal tip glides in a way that the Micron, Zig Millennium and others don't - it really enhances the drawing experience for me.
In the image here you see me playing around the pen and working on the structure of the head. I was trying to simplify a photo of a skull I was looking at into planes - as you can see, it got overly complicated and I left it. This week I will dig up a drawing that has the head already simplified into planes.
Finally, I've been playing around with the template on my blog, let me know what you think. I went with a template closer to my website template, for continuity.