Thanks George,
The man is coming to see the results today. It is no fault of mine that this has not worked too well The material is NOT slate, it is reconstituted slate i.e. a mix of ground slate and resin. He can decide if he wants the results as is or take the piece away.
Strangely enough I had a call from someone, just this week, asking if I would etch a piece of slate with a Celtic Cross ??. I told them about the difference between the slate options and have not heard back from them.
Thanks for the offer to look at the setups, I think the piece is 380 x 255 with a picture on it and the etching needs to be restricted to a space at the top and the bottom. I run the raster twice and then the vector to make sure it's tidy, not sure that's the best way to do it.
Thanks again
Don W