You could do good work on a Heavy 10. Run any prospective machine you might buy at all speeds and through all the gears in the threading gearbox. Run the carriage the full length of the bed, both by hand and under power. Run the carriage crossfeed by hand and under power. Listen and feel for rhythmic clicks or throbs- most machines have been crashed at some point(s) which can result in a damaged gear tooth (clicks) in the threading gearbox or elsewhere… or a bent shaft (throb) somewhere. It happens. Doesn’t mean the machine is toast but a good thing to know about before buying rather than after.
