got one of these, (you need a chunky compressor for an air one)
https://www.toolden.co.uk/power-tools/d ... 9LEALw_wcB
turned my garage into a "dark satanic mill" black dust and metal bits everyhwere, magnetic screw drivers all grew beards
so i now use it OUTSIDE only
does give you cramp in the hands eventually
it is much like an angle grinder, intent on nicking off in a direction where it should not go in order to cause mayhem.
a light touch, slow and steady is the way
basically a small milling machine in your hands dpending on tool used. get tools with a decent length shaft so the body of the grinder is not obstructing your view of the work being done. stubby short ones are easier to control but you can't see properly
check out cartridge rolls as well. good for finishing...even pattern etc
dave