Thanks for the comment on the dial. I just noticed that the image was on its side - no idea how that happened!

Indeed twice the price, but having made expensive mistakes in the past ended up purchasing a 2nd time this is something I'd like to get right.

Having taken some advice from a friend who know more about CNC machines, I'm on the verge of considering the FoxAlien Vasto machine which uses linear rails and 16mm ball screws. The spindle I suspect with a max speed of 10000rpm is something which needs upgrading for engraving, but its a good starting point if I run the machine a slow feed rates. I'm not under any illusions this machine can be run fast as the design of these things is not as sturdy as my Centec mill for example, but the Y travel of this format of machine isn't any good for the surface I want to be engraving.

I'll report back on how I get on. CNC is completely new to me as I'm very much a manual machine tool user.