How do older Kemppi machines fare for reliability / spare parts / support?, looking at possibly picking up a secondhand 3ph Kemppi Mastertig locally. Any opinions welcome!
Depends how good your dealer is... We wrote off a few mastertigs before 10 years, because they couldn't/didn't want to repair them economically.
Common fault is the main control knob failing - iirc it's an optical encoder? I got one of the scrapped machines and soldered a new one in, it was a few years back now though.