Not sure what it is but you better handle it carefully...
I think maybe the details could look better if I were to alternate between different pen's widths, but it's often weirdly hard to let go of the one I'm currently holding in my hand, I need to become a bit more patient, perhaps.
Speaking of which, I'm should think about making a trip to a stationery store, I'll soon run out of materials otherwise.
sometimes it's hard to change tools.