Digital BW, The Print

Hi. I've been using EZN prefilled carts for a while now and am quite 
satisfied with their performance, if a bit on the expensive side. 
Accordingly, I'm weighing the feasibility of filling the carts myself with 
bulk ink (MIS EZN).

I'm wondering what the experience of others has been refilling carts for the 
C86.

As an aside, my sense is that refilling carts, even spongeless carts, can 
border on the problematic - I'm hoping my sense is a little too pessimistic 
via-a-vis actual experience with the C86.

Thanks!

Al Young