I don’t need to but it is convenient. My pens can be put into three categories. The Kaweco Sports: very useful to put in pen holders on notebooks. Pens with broader nibs. Great for drawing likes and scribbling out stuff. Pens with finer nibs. My current preference for general writing Having this many pens in rotation makes it easy to just rotating out pens that are dry and in new ones from my desk and being able to clean and re-ink pens as I have time.