I see here 1 dangerous mistake... There is a second "conector". Use something to open it by pushing. This will let for decopression after/during the refilling. Whitout it, there is a risk of damadging catridge. I know, U make a vacum inside, but I am not sure is it secure? And a second thing... U can use orginal brother ink in bottles. It's more expensive but U reducing the risk of interraction between two different inks inside one cartridge.
I'm using original cartridges. I don't have a chip resetter that's why the display is showing ink levels with question mark. Just click exit and the printer is working fine.
