How easy HP21 refill can be done~

Let's try to refill HP21 by new method!!!!

This is an ordinary HP21 cartridge and any refill attempt has not been done.

As u see, there is no needle hole on the top of the cartridge.

By using "ROADINK" refill kit, let's start the refill.
Grab "Cartridge Hoder" and cartridge, attach together as shown.
Maybe little difficult? No, certainly not. Unless you ignore this picture.

And then attach the cartridge until "click" sound occurs.

Through the hole located at the bottom of the cartridge holder, insert the syringe with ink.

Well this is it!!! Can't be easier than this, huh?