Hello All, I have a CON-70 on a Pilot 742 and it doesn't suck up ink.... It used to work a year ago but I tried it yesterday and nothing. I have taken it apart, gently, and silicon greased the white piston's edges and it seems to move up and down smoothly but it still doesn't work any more. I have more than one CON-70 and know how to fill them. Aside from taking the sleeve off and opening up the main chamber, is there something else I can do or is this it?