For some people it was very difficult to install Con-70 all the way.
(mostly for some S. Korean users, strangely there's been almost zero feedback from global users).
below is an example of wrong installation:
it needs to be pushed in further.
to do that easily,
simply empty the ink converter,
then push the end against the floor / desk (protect the surface with some paper, if needed).
use two hands if necessary, although you don't want to apply extreme pressure.
because a large force can be applied, even with one hand.
below is the correct installation photo (assuming there's an oring installed inside, initial versions do not have oring inside --- it should be fine even without an oring, it's an additional 2nd layer protection).
since the o-ring is 1mm thick, there should be around 0.7mm space outside as the oring gets compressed.
the opening of the con-70 will push firmly against Oring inside,
and this will ensure 100% tight seal.
through this research, I became confident that,
with periodic replacement of the internal oring, this sealing system will last my original objective of 100 years !
