As I will continue to do - Here's a re-cap of the 4 previous parts of the review:
Recap of Part 1:
- How did the TWSBI come about?
- What is the TWSBI is all about?
- What exactly is the TWSBI Diamond 530?
Recap of Part 4:
- The nib
- How does it write?
- Writing samples
Piston fillers are just really cool looking. Especially in a demonstrator.
You can see the piston head, the piston rod, and all the other cool parts up at the top. To me, having a lever filling a c/c filling demonstrator is sort of a waste. I tihnk demonstrator should be reserved for interesting filling systems such as: pistons, vacumatics, lever-fillers, and button fillers. I think those pens have enough of an interesting mechanism to deserve a demo body. Also, all of those fillers, if you'll notice, have the filling system incorporated into the body of the pen.
Here's the piston nob with the piston rod coming out into the knob chamber.
Overall, piston fillers are cool, fun, interesting, and work extremely well too!