Print-making is quite a popular craft hobby, it seems, and expert groups can sometimes be found. I did wonder if contacting my local group would be a quicker way to get up the learning curve. They are primarily creative artists whereas my problem is strictly technical. But they do seem pretty well equipped
https://www.oxfordprintmakers.co.uk/equipment.html. I wouldn't be surprised to find they had a good deal of expertise too.
Cheers,
GJ