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This is a pocket-sized version of https://www.printables.com/model/369588-fountain-pen-version-25. There are two options for cap and barrel - tapered and straight - which are interchangeable. The tapered pen is about 10.5cm long, the straight pen is about 10cm.
This design will probably work with a cartridge, but I haven't tested this as I don't have any Hongdian cartridges. It's too long for a converter, so I cut down a spare converter I had and turned it into a pseudo-cartridge (the last picture shows the cut converter).
Layer Height: 0.2
Infill: 20%
Названия используются только для указания источника результата. Polyzon не аффилирован с перечисленными площадками.