Those are some nice pens! I have turned 2 of the new woodcraft acrylics and one cracked while drilling and the other one tryed to. Had the second one clamped in the vise and a c-clamp on the other end and a piece of backup wood clamped at the end. They also seemed a little more chippy than the other acrylics i have turned. (Im new so only turned a few.) Did you notice any problems with yours ? Mat just be me.