Comparing the cross-compatible Pilot CON-40, Majohn A1, and Jinhao 10 converters extended and retracted.
The Jinhao has the shortest travel distance, around 13mm. Majohn is about 17mm. Both confirmed with a micrometer. CON-40 is about 16mm, but couldn't measure directly.
Explains why the J10/20 converters run out of ink faster, but doesn't explain why CON-40 never seems to fill as much as either of the other two. The agitator parts interfering, perhaps?
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