The plain - redleaf ball point pen with a preppy nib.

i got a ballpoint pen where its ink is used up and the body is basically useless, and i made it into a fountain pen which must be loaded from the back This is a real first and an engineering breakthrough at least for me. 

The pen fully loaded.

The tutorial to make this pen at your own home for gifts or self entertainment will be released in a short while.

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The Tutorial (updated : 24Sep2015)

First the parts:you need

1) redleaf ballpoint pen body,

 

 2) a Preppy nib taken out of a platinum preppy fountain pen

Time for the assembly:

 1) remove the front of the pen body as such: 

2) make the hole bigger by either using a file or a screw driver to bore it a little. The diameter will be slightly bigger than than of the biggest part of the preppy nib only. It can be a little smaller since the nib will be friction fit, but that might scratch the nib unit or deform it a little. The key is to file a little and test with the nib, and continue further. What you are looking for is a "just-right" diameter. A diameter where you can friction-fit in quite easily, not force in. A diameter where it is not so large that the nib is able to rotate easily.

3) grease this end nicely.

4) insert in the nib. Greasing isn't really required, but can be done if you want.

That's all!

Now, to load (and reload) the pen. 

1)first, you need this syringe. it has to be a long needle syringe as the pen inner body is thin and the ink can be stuck halfway. This syringe is easily available from daiso.

2) load the syringe with your ink.

3) now, you can do it either in this 2 ways: 

a) load from the rear of the pen like so. this method will work if the pen is dry (or totally dried of ink) and you need to load rather quickly. note that the ink will be stuck way before the feed; don't worry. just fill it up. there is a component that will solve the problem.

b) load from the front with the nib out. this requires extraction of the nib. just pull it out, insert the syringe and load in the ink.

4) now, the special component. you need this long strip of heavy material to break the surface tension inside the pen. some people don't like metallic; i don't really think it matters. this is a piece of steel cut to 9 cm in length.

5) insert into the body of the pen. the ink will move along this component when it is nib up or nib down. now, either insert the nib or close the back of the pen, whichever is the way you took.

 And now, you have a fully loaded ballpoint pen with a fountain pen nib!

Doesn't the body looks nice? haha

Important disclaimer:

1) Proceed with caution! Ink can spill if you are not careful!

2) The cap of this pen isn't fully protecting the nib. Do not drop the capped pen with the cap down.

3) This is not the engineering for the Simplist model. That pen is much more complicated. Simplist cannot use the special component used in this pen. This component will instead cause the Simplist model not to write properly.