Thanks for all the replies - there is some really good information here for me to consider.
I'd certainly thought that the Chinese clone GRS system sounded too good to be true; I've had good experiences with Chinese machine tools for example, but I think I'll avoid this item.
Also good...
I'm looking for some guidance on getting started with engraving. So to introduce myself, I'm a clockmaker in the UK who can make pretty much any part of a clock, but I'd like to extend my skills in engraving my own dials and potentially decorative work on clock plates. This engraving in brass...