On 9900 series cartridges - just to confirm the filling sequence :
Do you need to plug the ink fill hole with the clear rubber plug BEFORE priming ? Or can I :
- leave clear fill plug off
- remove orange vent plug
- prime cart with syringe
- put ink from priming syringe back into the cart
- reinsert clear ink fill plug.
What is the purpose of the orange fill plug once it is removed ? Should it be used again when refilling the cartridges ? Or just toss it ?