I might have just screwed up with that suggestion. I need to check. Might have talked about the service engineer app.

Pump ink empties the machine of ink. Don't do that.

You can mount any vice that’s suitable height wise. Having removed the generic plate, naturally. There are plenty of threaded holes in the base frame to do that.

There’s one thing to consider with using low cost vices: they tend to misalign the piece when tightened due to sloppy mechanics.

In order for the white ink channel to work correctly you have to print weekly and shake the cartridge daily, even if you don’t print white that day. Captop replacement bi-annually. Less frequent than this you’ll start developing problems. Do not perform powerful cleanings unless you have most nozzle...

No overflow from the waste tank?

Have you ever replaced the outer pinch rollers? It may not be the main culprit but worn pinch rollers can’t track the media perfectly, allowing it to shift inwards.

Usually it is something stupid simple like this. I was once servicing a printer, years ago. One colour missing. I replaced pretty much everything I could, no effect. Called my colleague for ideas. He said perhaps the printer is out of ink.

It was.

That head is probably a goner.

True. It's also good to have warranty on parts and labour.

It's not difficult but it's also easy to break a printhead with a minimal effort while doing it. I do break one every now and then even after two decades of experience.