830U: still needs a heart bypass operation, it has bad veins which seem partly blocked. Adding the spirit-cleaner has triggered the error light which has not gone away for a few hours. the printer driver claims that the colour ink has run out- hard to believe since it was half-full before.
Laterz: it’s working now, except the yellow is still blocked. So an improvement.
Linseed: posted the Handprop picture in the "Finished" section of the photo galleries.