due to a mistake in designing, the recently posted cartridge was only compatible with older version models.
i was notified of this problem from a user, and the cartridge was redesigned immediately.
the machined part has been extended by 6mm.
now it fits all models.
ink flow is about 30~40% higher than using converter, when ink is full.
as the ink amount decreases, the ink flow will become similar to converter.
this effect is due to large amount of ink + gravitational force.
video) ink flow test / movement of air bubble is very slow inside the cartridge!
https://blog.naver.com/beatmaster90/222180276913