I am going to build a pen in the future. One of the many requirements I have is that it be able to use almost any refill. I’m constantly looking for the best refill. Often, the best refill doesn’t work in the best pen. To get the process started I thought I would do a survey of the most common refills and build my pen around them. I have not been able to find a diagram of a refill that labels the sections so I just labeled the sections a, b, and c. Uncreative, but it serves its purpose. The list of refills follows…
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