Big (ridiculos) simple piston fountain pen

thingiverse

It's the next development of https://www.thingiverse.com/thing:2969193. The main goal was to use the biggest o-ring from the set and make a bigger but still usable pen (to achieve this new features in the pen design were made). Still, all previous versions and future ones can be obtained from https://github.com/sanja-byelkin/SimplePistonPen. I included a snapshot of sources, but you can easily get them by: `git clone https://github.com/sanja-byelkin/SimplePistonPen.git` `cd SimplePistonPen` `git checkout V3` The ability for scaling was tested and fixed. I didn't polish the pen outside just to show how it looks like unpolished, but a polished variant is better at ink removal after filling the pen. Assemble, polishing, feeder, and nib are the same as for the previous small model: https://www.thingiverse.com/thing:2969193. Also, there are photos to compare with the small model and Lamy Safari. To make the pen in default configuration additionally (except printed parts), required: * Nib #6 (it's a nib size standard, can be used any nib (Peter Bock, Jowo, Noodler's, Jinhao, or even antique nib from some old broken pen)) * Ebonite feeder for Noodler's Ahab/Konrad pen or self-made ebonite feeder with diameter 6.3mm. * Two o-rings for piston (mine goes from some set of o-rings marked 2/3" - 1/2", bought in plumbers part of supermarket, see photo, external diameter of them is about 14mm, ring is about 2.5mm thick) * A bit of silicone grease * Sand paper or something else to polish inside tube with diameter 14mm (I used sand-paper 400, 800 and 1500 and put it with super-glue on printed cylinder which put on BBQ-steak)