Hello, yes working on the colorqube gem! I replaced 2 umbilical for upper and lower printheads, melting reservoir and 1 print head now I'm getting a consistent code 93-556 which it shows Head 2 yellow reservoir did not fill within the correct time. I performed dC976 Ink Delivery Fault Recovery, to prime the umbilicals after replacing the parts. I guess this is done only when replacing reservoir and umilicals together. swapped print heads,same error. I'm not sure if this is the umbillical or the reservoir? thanks! any help would be greatly appreciated