DFL- October Sketchbook

I bought a Kuretake Calligraphy pen to draw with in my DFL - October Sketchbook. It has two markers in one! One side is 2.0 mm, the tip I use for drawing, and the other is 5.0 mm, good for blocking (if necessary). I'm curious to find out how many pages it will last. Takes a little getting used to it, but liking it a lot so far.

Here's some of the first sketches with the Kuretake pen...