Great looking pen Dan. I am going to turn a couple more of the zebra wood pens.
Look at the post on my duck call
here, to see the 45° x-cut. I didn't have any problems with turning it. Also, look at the grain of light to dark wood on mine. I find that the greater contrasted wood turns better for me. I have some with less of the dark wood and it catches more than what the duck call does. I will say that I sharpened my chisels before hand and "touched" them up about 4 times during the turning.