Retractable Ballpoint Pen 2.0

Same as my Dragon Pen, you can use Zebra JF or Pilot LP3RF refill(Diameter 6.1mm, Length 111mm) in this pen, and may be capable of other brands of refill. You can add comments if it's possible. Updated 20250723Recently, I modified the Spring version to make it thinner. Finally, I successfully made the diameter to 12.6mm, as the image below shows. You still need to use the tool to help the functional parts work. Print profile updated as well.The Model files are in the “Retractable Ballpoint Pen V2-Spring” file. Use the filament settings as shown in the image below to achieve the hidden seam surface.Updated 20250322Recently, I designed a series