ExiledEnigmaHello, is very easy to work with it. It work as a small pump and you couls see on You Tube many video about.
I send you here below a couple:
https://www.youtube.com/watch?v=_ZxU89iWX0A
https://www.youtube.com/watch?v=dNSOyoGlfug
Please remember that our pens could be used both with converter but also with international standard type cartridges and we always pur a box of these cartridges into our pen boxes.
always at your disposal!
Best regards from Italy
Maurizio Stura